考试内容:下面属于安全电压的是A:42伏B:36伏C:24伏D:12伏多选题 有哪位高手能帮我总结一下初二和初三的物理? 内容:1.所有的...
\u4e3a\u4ec0\u4e48\u6211\u4eec\u8ba4\u4e3a\u4f4e\u4e8e36\u4f0f\u7684\u7535\u538b\u624d\u662f\u5b89\u5168\u7684?\u6025~~~\u521d\u4e2d\u7269\u7406\u8bfe\u672c\u4e2d\u8bf4\uff1a\u201c\u901a\u8fc7\u4eba\u4f53\u7684\u7535\u6d41\u5927\u5c0f\u51b3\u5b9a\u4e8e\u5916\u52a0\u7535\u538b\u548c\u4eba\u4f53\u7535\u963b\u3002\u2026\u2026\u7ecf\u9a8c\u8bc1\u660e\uff0c\u53ea\u6709\u4e0d\u9ad8\u4e8e36\u4f0f\u7684\u7535\u538b\u624d\u662f\u5b89\u5168\u7684\u3002\u201d\u6211\u4eec\u5e38\u628a36\u4f0f\u7279\u4ee5\u4e0b\u7684\u7535\u538b\u53eb\u505a\u5b89\u5168\u7535\u538b\u3002
\u4e3a\u4ec0\u4e48\u628a36\u4f0f\u89c4\u5b9a\u4e3a\u5b89\u5168\u7535\u538b\u7684\u754c\u9650\u5462\uff1f\u539f\u6765\u4eba\u4f53\u901a\u8fc75\u6beb\u5b89\u4ee5\u4e0b\u7684\u7535\u6d41\u65f6\uff0c\u53ea\u4ea7\u751f\u201c\u9ebb\u7535\u201d\u7684\u611f\u89c9\uff0c\u6ca1\u6709\u5371\u9669\u3002\u800c\u4eba\u7684\u5e72\u71e5\u76ae\u80a4\u7535\u963b\u4e00\u822c\u57281\u4e07\u6b27\u4ee5\u4e0a\uff0c\u572836\u4f0f\u7279\u7535\u538b\u4e0b\uff0c\u901a\u8fc7\u4eba\u4f53\u7684\u7535\u6d41\u57285\u6beb\u5b89\u4ee5\u4e0b\u3002\u6240\u4ee5\uff0c\u4e00\u822c\u8bf4\u676536\u4f0f\u7684\u7535\u538b\u5bf9\u4eba\u4f53\u662f\u5b89\u5168\u7684\u3002
\u4f46\u5e94\u6ce8\u610f\uff0c\u5728\u6f6e\u6e7f\u7684\u73af\u5883\u91cc\uff0c\u5b89\u5168\u7535\u538b\u503c\u5e94\u4f4e\u4e8e36\u4f0f\u3002\u56e0\u4e3a\u5728\u8fd9\u79cd\u73af\u5883\u4e0b\uff0c\u4eba\u4f53\u76ae\u80a4\u7684\u7535\u963b\u53d8\u5c0f\uff0c\u8fd9\u65f6\u52a0\u5728\u4eba\u4f53\u4e24\u90e8\u4f4d\u4e4b\u95f4\u7684\u7535\u538b\u5373\u4f7f\u662f36\u4f0f\u4e5f\u662f\u5371\u9669\u7684\u3002\u6240\u4ee5\uff0c\u8fd9\u65f6\u5e94\u91c7\u7528\u66f4\u4f4e\u768424\u4f0f\u621612\u4f0f\u7535\u538b\u624d\u5b89\u5168\u3002
\u53e6\u5916\uff0c\u6709\u7684\u540c\u5b66\u8fd8\u53ef\u80fd\u8bef\u8ba4\u4e3a\uff1a\u53ea\u8981\u67d0\u7528\u7535\u5668\u4e24\u7aef\u7684\u7535\u538b\u4e0d\u8d85\u8fc736\u4f0f\uff0c\u4eba\u5c31\u53ef\u4ee5\u968f\u4fbf\u89e6\u53ca\u7528\u7535\u5668\u7684\u5e26\u7535\u90e8\u5206\u800c\u4e0d\u53d1\u751f\u89e6\u7535\u4e8b\u6545\u3002\u8fd9\u662f\u4e0d\u5bf9\u7684\u3002\u5982\u56fe5\uff0d1\u6240\u793a\uff0c\u5982\u679c\u7528\u7535\u5668A\u7684\u4e24\u7aefc\u548cd\u4e4b\u95f4\u7684\u7535\u538b\u4e0d\u8d85\u8fc736\u4f0f\uff0c\u90a3\u4e48\u6211\u4eec\u80fd\u5426\u968f\u4fbf\u53bb\u63a5\u89e6c\u7aef\u548cd\u7aef\u5462\uff1f\u4e0d\u884c\uff01\u56e0\u4e3a\u63a5\u89e6c\u7aef\u7b49\u4e8e\u63a5\u89e6\u706b\u7ebf\uff0c\u800c\u706b\u7ebf\u5bf9\u5730\u7684\u7535\u538b\u662f220\u4f0f\uff0c\u6709\u5371\u9669\uff1b\u63a5\u89e6d\u7aef\uff0c\u5b83\u5bf9\u5730\u7684\u7535\u538b\u81f3\u5c11\u6709184\u4f0f\uff0c\u4e5f\u6709\u5371\u9669\u3002\u53ef\u89c1\u4e00\u4e2a\u7528\u7535\u5668\u4e24\u7aef\u7535\u538b\u867d\u7136\u4e0d\u8d85\u8fc736\u4f0f\uff0c\u4f46\u5bf9\u4eba\u4f53\u6765\u8bf4\u4e0d\u4e00\u5b9a\u662f\u5b89\u5168\u7684\u3002\u56e0\u4e3a\u7528\u7535\u5668\u4e24\u7aef\u7684\u7535\u538b\u548c\u52a0\u5728\u4eba\u4f53\u4e0a\u7684\u7535\u538b\u662f\u4e24\u56de\u4e8b\u3002
\u7efc\u4e0a\u6240\u8ff0\uff0c\u201c\u53ea\u6709\u4e0d\u9ad8\u4e8e36\u4f0f\u7279\u7684\u7535\u538b\u624d\u662f\u5b89\u5168\u7684\u201d\u8fd9\u53e5\u8bdd\u5e94\u7406\u89e3\u4e3a\uff1a\u5728\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u53ea\u6709\u52a0\u5728\u4eba\u4f53\u4e0a\u4e0d\u540c\u90e8\u4f4d\u4e4b\u95f4\u7684\u7535\u538b\u4e0d\u9ad8\u4e8e36\u4f0f\u624d\u662f\u5b89\u5168\u7684\u3002
\u300a\u7269\u7406\u4e16\u754c\u300b\u7b2c\u4e8c\u518c
\u7406\u91cf \u5355\u4f4d \u516c\u5f0f
\u540d\u79f0 \u7b26\u53f7 \u540d\u79f0 \u7b26\u53f7
\u8d28\u91cf m \u5343\u514b kg m=pv
\u6e29\u5ea6 t \u6444\u6c0f\u5ea6 \u00b0C
\u901f\u5ea6 v \u7c73\uff0f\u79d2 m/s v=s/t
\u5bc6\u5ea6 p \u5343\u514b\uff0f\u7c73³ kg/m³ p=m/v
\u529b\uff08\u91cd\u529b\uff09 F \u725b\u987f\uff08\u725b\uff09 N G=mg
\u538b\u5f3a P \u5e15\u65af\u5361\uff08\u5e15\uff09 Pa P=F/S
\u529f W \u7126\u8033\uff08\u7126\uff09 J W=Fs
\u529f\u7387 P \u74e6\u7279\uff08\u74e6\uff09 w P=W/t
\u7535\u6d41 I \u5b89\u57f9\uff08\u5b89\uff09 A I=U/R
\u7535\u538b U \u4f0f\u7279\uff08\u4f0f\uff09 V U=IR
\u7535\u963b R \u6b27\u59c6\uff08\u6b27\uff09 R=U/I
\u7535\u529f W \u7126\u8033\uff08\u7126\uff09 J W=UIt
\u7535\u529f\u7387 P \u74e6\u7279\uff08\u74e6\uff09 w P=W/t=UI
\u70ed\u91cf Q \u7126\u8033\uff08\u7126\uff09 J Q=cm(t-t\u00b0)
\u6bd4\u70ed c \u7126\uff0f\uff08\u5343\u514b\u00b0C\uff09 J/(kg\u00b0C)
\u771f\u7a7a\u4e2d\u5149\u901f 3\u00d7108\u7c73\uff0f\u79d2
g 9.8\u725b\u987f\uff0f\u5343\u514b
15\u00b0C\u7a7a\u6c14\u4e2d\u58f0\u901f 340\u7c73\uff0f\u79d2
\u5b89\u5168\u7535\u538b \u4e0d\u9ad8\u4e8e36\u4f0f
\u521d\u4e2d\u7269\u7406\u57fa\u672c\u6982\u5ff5\u6982\u8981
\u4e00\u3001\u6d4b\u91cf
\u2488\u957f\u5ea6L\uff1a\u4e3b\u5355\u4f4d:\u7c73\uff1b\u6d4b\u91cf\u5de5\u5177:\u523b\u5ea6\u5c3a\uff1b\u6d4b\u91cf\u65f6\u8981\u4f30\u8bfb\u5230\u6700\u5c0f\u523b\u5ea6\u7684\u4e0b\u4e00\u4f4d\uff1b\u5149\u5e74\u7684\u5355\u4f4d\u662f\u957f\u5ea6\u5355\u4f4d\u3002
\u2489\u65f6\u95f4t\uff1a\u4e3b\u5355\u4f4d:\u79d2\uff1b\u6d4b\u91cf\u5de5\u5177:\u949f\u8868\uff1b\u5b9e\u9a8c\u5ba4\u4e2d\u7528\u505c\u8868\u30021\u65f6\uff1d3600\u79d2\uff0c1\u79d2\uff1d1000\u6beb\u79d2\u3002
\u248a\u8d28\u91cfm\uff1a\u7269\u4f53\u4e2d\u6240\u542b\u7269\u8d28\u7684\u591a\u5c11\u53eb\u8d28\u91cf\u3002\u4e3b\u5355\u4f4d\uff1a\u5343\u514b\uff1b \u6d4b\u91cf\u5de5\u5177\uff1a\u79e4\uff1b\u5b9e\u9a8c\u5ba4\u7528\u6258\u76d8\u5929\u5e73\u3002
\u4e8c\u3001\u673a\u68b0\u8fd0\u52a8
\u2488\u673a\u68b0\u8fd0\u52a8\uff1a\u7269\u4f53\u4f4d\u7f6e\u53d1\u751f\u53d8\u5316\u7684\u8fd0\u52a8\u3002
\u53c2\u7167\u7269\uff1a\u5224\u65ad\u4e00\u4e2a\u7269\u4f53\u8fd0\u52a8\u5fc5\u987b\u9009\u53d6\u53e6\u4e00\u4e2a\u7269\u4f53\u4f5c\u6807\u51c6\uff0c\u8fd9\u4e2a\u88ab\u9009\u4f5c\u6807\u51c6\u7684\u7269\u4f53\u53eb\u53c2\u7167\u7269\u3002
\u2489\u5300\u901f\u76f4\u7ebf\u8fd0\u52a8\uff1a
\u2460\u6bd4\u8f83\u8fd0\u52a8\u5feb\u6162\u7684\u4e24\u79cd\u65b9\u6cd5\uff1aa \u6bd4\u8f83\u5728\u76f8\u7b49\u65f6\u95f4\u91cc\u901a\u8fc7\u7684\u8def\u7a0b\u3002b \u6bd4\u8f83\u901a\u8fc7\u76f8\u7b49\u8def\u7a0b\u6240\u9700\u7684\u65f6\u95f4\u3002
\u2461\u516c\u5f0f\uff1a 1\u7c73\uff0f\u79d2\uff1d3.6\u5343\u7c73\uff0f\u65f6\u3002
\u4e09\u3001\u529b
\u2488\u529bF\uff1a\u529b\u662f\u7269\u4f53\u5bf9\u7269\u4f53\u7684\u4f5c\u7528\u3002\u7269\u4f53\u95f4\u529b\u7684\u4f5c\u7528\u603b\u662f\u76f8\u4e92\u7684\u3002
\u529b\u7684\u5355\u4f4d\uff1a\u725b\u987f\uff08N\uff09\u3002\u6d4b\u91cf\u529b\u7684\u4eea\u5668\uff1a\u6d4b\u529b\u5668\uff1b\u5b9e\u9a8c\u5ba4\u4f7f\u7528\u5f39\u7c27\u79e4\u3002
\u529b\u7684\u4f5c\u7528\u6548\u679c\uff1a\u4f7f\u7269\u4f53\u53d1\u751f\u5f62\u53d8\u6216\u4f7f\u7269\u4f53\u7684\u8fd0\u52a8\u72b6\u6001\u53d1\u751f\u6539\u53d8\u3002
\u7269\u4f53\u8fd0\u52a8\u72b6\u6001\u6539\u53d8\u662f\u6307\u7269\u4f53\u7684\u901f\u5ea6\u5927\u5c0f\u6216\u8fd0\u52a8\u65b9\u5411\u6539\u53d8\u3002
\u2489\u529b\u7684\u4e09\u8981\u7d20\uff1a\u529b\u7684\u5927\u5c0f\u3001\u65b9\u5411\u3001\u4f5c\u7528\u70b9\u53eb\u505a\u529b\u7684\u4e09\u8981\u7d20\u3002
\u529b\u7684\u56fe\u793a\uff0c\u8981\u4f5c\u6807\u5ea6\uff1b\u529b\u7684\u793a\u610f\u56fe\uff0c\u4e0d\u4f5c\u6807\u5ea6\u3002
\u248a\u91cd\u529bG\uff1a\u7531\u4e8e\u5730\u7403\u5438\u5f15\u800c\u4f7f\u7269\u4f53\u53d7\u5230\u7684\u529b\u3002\u65b9\u5411\uff1a\u7ad6\u76f4\u5411\u4e0b\u3002
\u91cd\u529b\u548c\u8d28\u91cf\u5173\u7cfb\uff1aG=mg m=G/g
g=9.8\u725b\uff0f\u5343\u514b\u3002\u8bfb\u6cd5\uff1a9.8\u725b\u6bcf\u5343\u514b\uff0c\u8868\u793a\u8d28\u91cf\u4e3a1\u5343\u514b\u7269\u4f53\u6240\u53d7\u91cd\u529b\u4e3a9.8\u725b\u3002
\u91cd\u5fc3\uff1a\u91cd\u529b\u7684\u4f5c\u7528\u70b9\u53eb\u505a\u7269\u4f53\u7684\u91cd\u5fc3\u3002\u89c4\u5219\u7269\u4f53\u7684\u91cd\u5fc3\u5728\u7269\u4f53\u7684\u51e0\u4f55\u4e2d\u5fc3\u3002
\u248b\u4e8c\u529b\u5e73\u8861\u6761\u4ef6\uff1a\u4f5c\u7528\u5728\u540c\u4e00\u7269\u4f53\uff1b\u4e24\u529b\u5927\u5c0f\u76f8\u7b49\uff0c\u65b9\u5411\u76f8\u53cd\uff1b\u4f5c\u7528\u5728\u4e00\u76f4\u7ebf\u4e0a\u3002
\u7269\u4f53\u5728\u4e8c\u529b\u5e73\u8861\u4e0b\uff0c\u53ef\u4ee5\u9759\u6b62\uff0c\u4e5f\u53ef\u4ee5\u4f5c\u5300\u901f\u76f4\u7ebf\u8fd0\u52a8\u3002
\u7269\u4f53\u7684\u5e73\u8861\u72b6\u6001\u662f\u6307\u7269\u4f53\u5904\u4e8e\u9759\u6b62\u6216\u5300\u901f\u76f4\u7ebf\u8fd0\u52a8\u72b6\u6001\u3002\u5904\u4e8e\u5e73\u8861\u72b6\u6001\u7684\u7269\u4f53\u6240\u53d7\u5916\u529b\u7684\u5408\u529b\u4e3a\u96f6\u3002
\u248c\u540c\u4e00\u76f4\u7ebf\u4e8c\u529b\u5408\u6210\uff1a\u65b9\u5411\u76f8\u540c\uff1a\u5408\u529bF=F1+F2 ;\u5408\u529b\u65b9\u5411\u4e0eF1\u3001F2\u65b9\u5411\u76f8\u540c\uff1b
\u65b9\u5411\u76f8\u53cd\uff1a\u5408\u529bF=F1-F2\uff0c\u5408\u529b\u65b9\u5411\u4e0e\u5927\u7684\u529b\u65b9\u5411\u76f8\u540c\u3002
\u248d\u76f8\u540c\u6761\u4ef6\u4e0b\uff0c\u6eda\u52a8\u6469\u64e6\u529b\u6bd4\u6ed1\u52a8\u6469\u64e6\u529b\u5c0f\u5f97\u591a\u3002
\u6ed1\u52a8\u6469\u64e6\u529b\u4e0e\u6b63\u538b\u529b\uff0c\u63a5\u89e6\u9762\u6750\u6599\u6027\u8d28\u548c\u7c97\u7cd9\u7a0b\u5ea6\u6709\u5173\u3002\u3010\u6ed1\u52a8\u6469\u64e6\u3001\u6eda\u52a8\u6469\u64e6\u3001\u9759\u6469\u64e6\u3011
7\uff0e\u725b\u987f\u7b2c\u4e00\u5b9a\u5f8b\u4e5f\u79f0\u4e3a\u60ef\u6027\u5b9a\u5f8b\u5176\u5185\u5bb9\u662f\uff1a\u4e00\u5207\u7269\u4f53\u5728\u4e0d\u53d7\u5916\u529b\u4f5c\u7528\u65f6\uff0c\u603b\u4fdd\u6301\u9759\u6b62\u6216\u5300\u901f\u76f4\u7ebf\u8fd0\u52a8\u72b6\u6001\u3002 \u60ef\u6027\uff1a\u7269\u4f53\u5177\u6709\u4fdd\u6301\u539f\u6765\u7684\u9759\u6b62\u6216\u5300\u901f\u76f4\u7ebf\u8fd0\u52a8\u72b6\u6001\u7684\u6027\u8d28\u53eb\u505a\u60ef\u6027\u3002
\u56db\u3001\u5bc6\u5ea6
\u2488\u5bc6\u5ea6\u03c1\uff1a\u67d0\u79cd\u7269\u8d28\u5355\u4f4d\u4f53\u79ef\u7684\u8d28\u91cf\uff0c\u5bc6\u5ea6\u662f\u7269\u8d28\u7684\u4e00\u79cd\u7279\u6027\u3002
\u516c\u5f0f\uff1a m=\u03c1V \u56fd\u9645\u5355\u4f4d\uff1a\u5343\u514b\uff0f\u7c733 \uff0c\u5e38\u7528\u5355\u4f4d\uff1a\u514b\uff0f\u5398\u7c733\uff0c
\u5173\u7cfb\uff1a1\u514b\uff0f\u5398\u7c733\uff1d1\u00d7103\u5343\u514b\uff0f\u7c733\uff1b\u03c1\u6c34\uff1d1\u00d7103\u5343\u514b\uff0f\u7c733\uff1b
\u8bfb\u6cd5\uff1a103\u5343\u514b\u6bcf\u7acb\u65b9\u7c73\uff0c\u8868\u793a1\u7acb\u65b9\u7c73\u6c34\u7684\u8d28\u91cf\u4e3a103\u5343\u514b\u3002
\u2489\u5bc6\u5ea6\u6d4b\u5b9a\uff1a\u7528\u6258\u76d8\u5929\u5e73\u6d4b\u8d28\u91cf\uff0c\u91cf\u7b52\u6d4b\u56fa\u4f53\u6216\u6db2\u4f53\u7684\u4f53\u79ef\u3002
\u9762\u79ef\u5355\u4f4d\u6362\u7b97\uff1a
1\u5398\u7c732=1\u00d710-4\u7c732\uff0c
1\u6beb\u7c732=1\u00d710-6\u7c732\u3002
\u4e94\u3001\u538b\u5f3a
\u2488\u538b\u5f3aP\uff1a\u7269\u4f53\u5355\u4f4d\u9762\u79ef\u4e0a\u53d7\u5230\u7684\u538b\u529b\u53eb\u505a\u538b\u5f3a\u3002
\u538b\u529bF\uff1a\u5782\u76f4\u4f5c\u7528\u5728\u7269\u4f53\u8868\u9762\u4e0a\u7684\u529b\uff0c\u5355\u4f4d\uff1a\u725b\uff08N\uff09\u3002
\u538b\u529b\u4ea7\u751f\u7684\u6548\u679c\u7528\u538b\u5f3a\u5927\u5c0f\u8868\u793a\uff0c\u8ddf\u538b\u529b\u5927\u5c0f\u3001\u53d7\u529b\u9762\u79ef\u5927\u5c0f\u6709\u5173\u3002
\u538b\u5f3a\u5355\u4f4d\uff1a\u725b/\u7c732\uff1b\u4e13\u95e8\u540d\u79f0\uff1a\u5e15\u65af\u5361\uff08Pa\uff09
\u516c\u5f0f\uff1a F=PS \u3010S\uff1a\u53d7\u529b\u9762\u79ef\uff0c\u4e24\u7269\u4f53\u63a5\u89e6\u7684\u516c\u5171\u90e8\u5206\uff1b\u5355\u4f4d\uff1a\u7c732\u3002\u3011
\u6539\u53d8\u538b\u5f3a\u5927\u5c0f\u65b9\u6cd5\uff1a\u2460\u51cf\u5c0f\u538b\u529b\u6216\u589e\u5927\u53d7\u529b\u9762\u79ef\uff0c\u53ef\u4ee5\u51cf\u5c0f\u538b\u5f3a\uff1b\u2461\u589e\u5927\u538b\u529b\u6216\u51cf\u5c0f\u53d7\u529b\u9762\u79ef\uff0c\u53ef\u4ee5\u589e\u5927\u538b\u5f3a\u3002
\u2489\u6db2\u4f53\u5185\u90e8\u538b\u5f3a\uff1a\u3010\u6d4b\u91cf\u6db2\u4f53\u5185\u90e8\u538b\u5f3a\uff1a\u4f7f\u7528\u6db2\u4f53\u538b\u5f3a\u8ba1\uff08U\u578b\u7ba1\u538b\u5f3a\u8ba1\uff09\u3002\u3011
\u4ea7\u751f\u539f\u56e0\uff1a\u7531\u4e8e\u6db2\u4f53\u6709\u91cd\u529b\uff0c\u5bf9\u5bb9\u5668\u5e95\u4ea7\u751f\u538b\u5f3a\uff1b\u7531\u4e8e\u6db2\u4f53\u6d41\u52a8\u6027\uff0c\u5bf9\u5668\u58c1\u4ea7\u751f\u538b\u5f3a\u3002
\u89c4\u5f8b\uff1a\u2460\u540c\u4e00\u6df1\u5ea6\u5904\uff0c\u5404\u4e2a\u65b9\u5411\u4e0a\u538b\u5f3a\u5927\u5c0f\u76f8\u7b49\u2461\u6df1\u5ea6\u8d8a\u5927\uff0c\u538b\u5f3a\u4e5f\u8d8a\u5927\u2462\u4e0d\u540c\u6db2\u4f53\u540c\u4e00\u6df1\u5ea6\u5904\uff0c\u6db2\u4f53\u5bc6\u5ea6\u5927\u7684\uff0c\u538b\u5f3a\u4e5f\u5927\u3002 [\u6df1\u5ea6h\uff0c\u6db2\u9762\u5230\u6db2\u4f53\u67d0\u70b9\u7684\u7ad6\u76f4\u9ad8\u5ea6\u3002]
\u516c\u5f0f\uff1aP=\u03c1gh h\uff1a\u5355\u4f4d\uff1a\u7c73\uff1b \u03c1\uff1a\u5343\u514b\uff0f\u7c733\uff1b g=9.8\u725b\uff0f\u5343\u514b\u3002
\u248a\u5927\u6c14\u538b\u5f3a\uff1a\u5927\u6c14\u53d7\u5230\u91cd\u529b\u4f5c\u7528\u4ea7\u751f\u538b\u5f3a\uff0c\u8bc1\u660e\u5927\u6c14\u538b\u5b58\u5728\u4e14\u5f88\u5927\u7684\u662f\u9a6c\u5fb7\u5821\u534a\u7403\u5b9e\u9a8c\uff0c\u6d4b\u5b9a\u5927\u6c14\u538b\u5f3a\u6570\u503c\u7684\u662f\u6258\u91cc\u62c6\u5229\uff08\u610f\u5927\u5229\u79d1\u5b66\u5bb6\uff09\u3002\u6258\u91cc\u62c6\u5229\u7ba1\u503e\u659c\u540e\uff0c\u6c34\u94f6\u67f1\u9ad8\u5ea6\u4e0d\u53d8\uff0c\u957f\u5ea6\u53d8\u957f\u3002
1\u4e2a\u6807\u51c6\u5927\u6c14\u538b\uff1d76\u5398\u7c73\u6c34\u94f6\u67f1\u9ad8\uff1d1.01\u00d7105\u5e15\uff1d10.336\u7c73\u6c34\u67f1\u9ad8
\u6d4b\u5b9a\u5927\u6c14\u538b\u7684\u4eea\u5668\uff1a\u6c14\u538b\u8ba1\uff08\u6c34\u94f6\u6c14\u538b\u8ba1\u3001\u76d2\u5f0f\u6c14\u538b\u8ba1\uff09\u3002
\u5927\u6c14\u538b\u5f3a\u968f\u9ad8\u5ea6\u53d8\u5316\u89c4\u5f8b\uff1a\u6d77\u62d4\u8d8a\u9ad8\uff0c\u6c14\u538b\u8d8a\u5c0f\uff0c\u5373\u968f\u9ad8\u5ea6\u589e\u52a0\u800c\u51cf\u5c0f\uff0c\u6cb8\u70b9\u4e5f\u964d\u4f4e\u3002
\u516d\u3001\u6d6e\u529b
1\uff0e\u6d6e\u529b\u53ca\u4ea7\u751f\u539f\u56e0\uff1a\u6d78\u5728\u6db2\u4f53\uff08\u6216\u6c14\u4f53\uff09\u4e2d\u7684\u7269\u4f53\u53d7\u5230\u6db2\u4f53\uff08\u6216\u6c14\u4f53\uff09\u5bf9\u5b83\u5411\u4e0a\u6258\u7684\u529b\u53eb\u6d6e\u529b\u3002\u65b9\u5411\uff1a\u7ad6\u76f4\u5411\u4e0a\uff1b\u539f\u56e0\uff1a\u6db2\u4f53\u5bf9\u7269\u4f53\u7684\u4e0a\u3001\u4e0b\u538b\u529b\u5dee\u3002
2\uff0e\u963f\u57fa\u7c73\u5fb7\u539f\u7406\uff1a\u6d78\u5728\u6db2\u4f53\u91cc\u7684\u7269\u4f53\u53d7\u5230\u5411\u4e0a\u7684\u6d6e\u529b\uff0c\u6d6e\u529b\u5927\u5c0f\u7b49\u4e8e\u7269\u4f53\u6392\u5f00\u6db2\u4f53\u6240\u53d7\u91cd\u529b\u3002
\u5373F\u6d6e\uff1dG\u6db2\u6392\uff1d\u03c1\u6db2gV\u6392\u3002 \uff08V\u6392\u8868\u793a\u7269\u4f53\u6392\u5f00\u6db2\u4f53\u7684\u4f53\u79ef\uff09
3\uff0e\u6d6e\u529b\u8ba1\u7b97\u516c\u5f0f\uff1aF\u6d6e\uff1dG-T\uff1d\u03c1\u6db2gV\u6392\uff1dF\u4e0a\u3001\u4e0b\u538b\u529b\u5dee
4\uff0e\u5f53\u7269\u4f53\u6f02\u6d6e\u65f6\uff1aF\u6d6e\uff1dG\u7269 \u4e14 \u03c1\u7269<\u03c1\u6db2 \u5f53\u7269\u4f53\u60ac\u6d6e\u65f6\uff1aF\u6d6e\uff1dG\u7269 \u4e14 \u03c1\u7269=\u03c1\u6db2
\u5f53\u7269\u4f53\u4e0a\u6d6e\u65f6\uff1aF\u6d6e>G\u7269 \u4e14 \u03c1\u7269\u03c1\u6db2
\u4e03\u3001\u7b80\u5355\u673a\u68b0
\u2488\u6760\u6746\u5e73\u8861\u6761\u4ef6\uff1aF1l1\uff1dF2l2\u3002\u529b\u81c2\uff1a\u4ece\u652f\u70b9\u5230\u529b\u7684\u4f5c\u7528\u7ebf\u7684\u5782\u76f4\u8ddd\u79bb
\u901a\u8fc7\u8c03\u8282\u6760\u6746\u4e24\u7aef\u87ba\u6bcd\u4f7f\u6760\u6746\u5904\u4e8e\u6c34\u4f4d\u7f6e\u7684\u76ee\u7684\uff1a\u4fbf\u4e8e\u76f4\u63a5\u6d4b\u5b9a\u52a8\u529b\u81c2\u548c\u963b\u529b\u81c2\u7684\u957f\u5ea6\u3002
\u5b9a\u6ed1\u8f6e\uff1a\u76f8\u5f53\u4e8e\u7b49\u81c2\u6760\u6746\uff0c\u4e0d\u80fd\u7701\u529b\uff0c\u4f46\u80fd\u6539\u53d8\u7528\u529b\u7684\u65b9\u5411\u3002
\u52a8\u6ed1\u8f6e\uff1a\u76f8\u5f53\u4e8e\u52a8\u529b\u81c2\u662f\u963b\u529b\u81c22\u500d\u7684\u6760\u6746\uff0c\u80fd\u7701\u4e00\u534a\u529b\uff0c\u4f46\u4e0d\u80fd\u6539\u53d8\u7528\u529b\u65b9\u5411\u3002
\u2489\u529f\uff1a\u4e24\u4e2a\u5fc5\u8981\u56e0\u7d20\uff1a\u2460\u4f5c\u7528\u5728\u7269\u4f53\u4e0a\u7684\u529b\uff1b\u2461\u7269\u4f53\u5728\u529b\u65b9\u5411\u4e0a\u901a\u8fc7\u8ddd\u79bb\u3002W\uff1dFS \u529f\u7684\u5355\u4f4d\uff1a\u7126\u8033
3\uff0e\u529f\u7387\uff1a\u7269\u4f53\u5728\u5355\u4f4d\u65f6\u95f4\u91cc\u6240\u505a\u7684\u529f\u3002\u8868\u793a\u7269\u4f53\u505a\u529f\u7684\u5feb\u6162\u7684\u7269\u7406\u91cf\uff0c\u5373\u529f\u7387\u5927\u7684\u7269\u4f53\u505a\u529f\u5feb\u3002
W=Pt P\u7684\u5355\u4f4d\uff1a\u74e6\u7279\uff1b W\u7684\u5355\u4f4d\uff1a\u7126\u8033\uff1b t\u7684\u5355\u4f4d\uff1a\u79d2\u3002
\u516b\u3001\u5149
\u2488\u5149\u7684\u76f4\u7ebf\u4f20\u64ad\uff1a\u5149\u5728\u540c\u4e00\u79cd\u5747\u5300\u4ecb\u8d28\u4e2d\u662f\u6cbf\u76f4\u7ebf\u4f20\u64ad\u7684\u3002\u5c0f\u5b54\u6210\u50cf\u3001\u5f71\u5b50\u3001\u5149\u6591\u662f\u5149\u7684\u76f4\u7ebf\u4f20\u64ad\u73b0\u8c61\u3002
\u5149\u5728\u771f\u7a7a\u4e2d\u7684\u901f\u5ea6\u6700\u5927\u4e3a3\u00d7108\u7c73\uff0f\u79d2\uff1d3\u00d7105\u5343\u7c73\uff0f\u79d2
\u2489\u5149\u7684\u53cd\u5c04\u5b9a\u5f8b:\u4e00\u9762\u4e8c\u4fa7\u4e09\u7b49\u5927\u3002\u3010\u5165\u5c04\u5149\u7ebf\u548c\u6cd5\u7ebf\u95f4\u7684\u5939\u89d2\u662f\u5165\u5c04\u89d2\u3002\u53cd\u5c04\u5149\u7ebf\u548c\u6cd5\u7ebf\u95f4\u5939\u89d2\u662f\u53cd\u5c04\u89d2\u3002\u3011
\u5e73\u9762\u955c\u6210\u50cf\u7279\u70b9\uff1a\u865a\u50cf\uff0c\u7b49\u5927\uff0c\u7b49\u8ddd\u79bb\uff0c\u4e0e\u955c\u9762\u5bf9\u79f0\u3002\u7269\u4f53\u5728\u6c34\u4e2d\u5012\u5f71\u662f\u865a\u50cf\u5c5e\u5149\u7684\u53cd\u5c04\u73b0\u8c61\u3002
\u248a\u5149\u7684\u6298\u5c04\u73b0\u8c61\u548c\u89c4\u5f8b\uff1a \u770b\u5230\u6c34\u4e2d\u7b77\u5b50\u3001\u9c7c\u7684\u865a\u50cf\u662f\u5149\u7684\u6298\u5c04\u73b0\u8c61\u3002
\u51f8\u900f\u955c\u5bf9\u5149\u6709\u4f1a\u805a\u5149\u7ebf\u4f5c\u7528\uff0c\u51f9\u900f\u955c\u5bf9\u5149\u6709\u53d1\u6563\u5149\u7ebf\u4f5c\u7528\u3002 \u5149\u7684\u6298\u5c04\u5b9a\u5f8b\uff1a\u4e00\u9762\u4e8c\u4fa7\u4e09\u968f\u5927\u56db\u7a7a\u5927\u3002
\u248b\u51f8\u900f\u955c\u6210\u50cf\u89c4\u5f8b\uff1a[U=f\u65f6\u4e0d\u6210\u50cf U=2f\u65f6 V=2f\u6210\u5012\u7acb\u7b49\u5927\u7684\u5b9e\u50cf]
\u7269\u8dddu \u50cf\u8dddv \u50cf\u7684\u6027\u8d28 \u5149\u8def\u56fe \u5e94\u7528
u>2f f<v<2f \u5012\u7f29\u5c0f\u5b9e \u7167\u76f8\u673a
f2f \u5012\u653e\u5927\u5b9e \u5e7b\u706f\u673a
u<f \u653e\u5927\u6b63\u865a \u653e\u5927\u955c
\u248c\u51f8\u900f\u955c\u6210\u50cf\u5b9e\u9a8c\uff1a\u5c06\u8721\u70db\u3001\u51f8\u900f\u955c\u3001\u5149\u5c4f\u4f9d\u6b21\u653e\u5728\u5149\u5177\u5ea7\u4e0a\uff0c\u4f7f\u70db\u7130\u4e2d\u5fc3\u3001\u51f8\u900f\u955c\u4e2d\u5fc3\u3001\u5149\u5c4f\u4e2d\u5fc3\u5728\u540c\u4e00\u4e2a\u9ad8\u5ea6\u4e0a\u3002
\u4e5d\u3001\u70ed\u5b66\uff1a
\u2488\u6e29\u5ea6t\uff1a\u8868\u793a\u7269\u4f53\u7684\u51b7\u70ed\u7a0b\u5ea6\u3002\u3010\u662f\u4e00\u4e2a\u72b6\u6001\u91cf\u3002\u3011
\u5e38\u7528\u6e29\u5ea6\u8ba1\u539f\u7406\uff1a\u6839\u636e\u6db2\u4f53\u70ed\u80c0\u51b7\u7f29\u6027\u8d28\u3002
\u6e29\u5ea6\u8ba1\u4e0e\u4f53\u6e29\u8ba1\u7684\u4e0d\u540c\u70b9\uff1a\u2460\u91cf\u7a0b\uff0c\u2461\u6700\u5c0f\u523b\u5ea6\uff0c\u2462\u73bb\u7483\u6ce1\u3001\u5f2f\u66f2\u7ec6\u7ba1\uff0c\u2463\u4f7f\u7528\u65b9\u6cd5\u3002
\u2489\u70ed\u4f20\u9012\u6761\u4ef6\uff1a\u6709\u6e29\u5ea6\u5dee\u3002\u70ed\u91cf\uff1a\u5728\u70ed\u4f20\u9012\u8fc7\u7a0b\u4e2d\uff0c\u7269\u4f53\u5438\u6536\u6216\u653e\u51fa\u70ed\u7684\u591a\u5c11\u3002\u3010\u662f\u8fc7\u7a0b\u91cf\u3011
\u70ed\u4f20\u9012\u7684\u65b9\u5f0f\uff1a\u4f20\u5bfc\uff08\u70ed\u6cbf\u7740\u7269\u4f53\u4f20\u9012\uff09\u3001\u5bf9\u6d41\uff08\u9760\u6db2\u4f53\u6216\u6c14\u4f53\u7684\u6d41\u52a8\u5b9e\u73b0\u70ed\u4f20\u9012\uff09\u548c\u8f90\u5c04\uff08\u9ad8\u6e29\u7269\u4f53\u76f4\u63a5\u5411\u5916\u53d1\u5c04\u51fa\u70ed\uff09\u4e09\u79cd\u3002
\u248a\u6c7d\u5316\uff1a\u7269\u8d28\u4ece\u6db2\u6001\u53d8\u6210\u6c14\u6001\u7684\u73b0\u8c61\u3002\u65b9\u5f0f\uff1a\u84b8\u53d1\u548c\u6cb8\u817e\uff0c\u6c7d\u5316\u8981\u5438\u70ed\u3002
\u5f71\u54cd\u84b8\u53d1\u5feb\u6162\u56e0\u7d20\uff1a\u2460\u6db2\u4f53\u6e29\u5ea6\uff0c\u2461\u6db2\u4f53\u8868\u9762\u79ef\uff0c\u2462\u6db2\u4f53\u8868\u9762\u7a7a\u6c14\u6d41\u52a8\u3002\u84b8\u53d1\u6709\u81f4\u51b7\u4f5c\u7528\u3002
\u248b\u6bd4\u70ed\u5bb9C\uff1a\u5355\u4f4d\u8d28\u91cf\u7684\u67d0\u79cd\u7269\u8d28\uff0c\u6e29\u5ea6\u5347\u9ad81\u2103\u65f6\u5438\u6536\u7684\u70ed\u91cf\uff0c\u53eb\u505a\u8fd9\u79cd\u7269\u8d28\u7684\u6bd4\u70ed\u5bb9\u3002
\u6bd4\u70ed\u5bb9\u662f\u7269\u8d28\u7684\u7279\u6027\u4e4b\u4e00\uff0c\u5355\u4f4d\uff1a\u7126\uff0f\uff08\u5343\u514b\u2103\uff09 \u5e38\u89c1\u7269\u8d28\u4e2d\u6c34\u7684\u6bd4\u70ed\u5bb9\u6700\u5927\u3002
C\u6c34\uff1d4.2\u00d7103\u7126\uff0f\uff08\u5343\u514b\u2103\uff09 \u8bfb\u6cd5\uff1a4.2\u00d7103\u7126\u8033\u6bcf\u5343\u514b\u6444\u6c0f\u5ea6\u3002
\u7269\u7406\u542b\u4e49\uff1a\u8868\u793a\u8d28\u91cf\u4e3a1\u5343\u514b\u6c34\u6e29\u5ea6\u5347\u9ad81\u2103\u5438\u6536\u70ed\u91cf\u4e3a4.2\u00d7103\u7126\u3002
\u248c\u70ed\u91cf\u8ba1\u7b97\uff1aQ\u653e\uff1dcm\u22bft\u964d Q\u5438\uff1dcm\u22bft\u5347
Q\u4e0ec\u3001m\u3001\u22bft\u6210\u6b63\u6bd4\uff0cc\u3001m\u3001\u22bft\u4e4b\u95f4\u6210\u53cd\u6bd4\u3002\u22bft=Q/cm
6\uff0e\u5185\u80fd\uff1a\u7269\u4f53\u5185\u6240\u6709\u5206\u5b50\u7684\u52a8\u80fd\u548c\u5206\u5b50\u52bf\u80fd\u7684\u603b\u548c\u3002\u4e00\u5207\u7269\u4f53\u90fd\u6709\u5185\u80fd\u3002\u5185\u80fd\u5355\u4f4d\uff1a\u7126\u8033
\u7269\u4f53\u7684\u5185\u80fd\u4e0e\u7269\u4f53\u7684\u6e29\u5ea6\u6709\u5173\u3002\u7269\u4f53\u6e29\u5ea6\u5347\u9ad8\uff0c\u5185\u80fd\u589e\u5927\uff1b\u6e29\u5ea6\u964d\u4f4e\u5185\u80fd\u51cf\u5c0f\u3002
\u6539\u53d8\u7269\u4f53\u5185\u80fd\u7684\u65b9\u6cd5\uff1a\u505a\u529f\u548c\u70ed\u4f20\u9012\uff08\u5bf9\u6539\u53d8\u7269\u4f53\u5185\u80fd\u662f\u7b49\u6548\u7684\uff09
7\uff0e\u80fd\u7684\u8f6c\u5316\u548c\u5b88\u6052\u5b9a\u5f8b\uff1a\u80fd\u91cf\u5373\u4e0d\u4f1a\u51ed\u7a7a\u4ea7\u751f\uff0c\u4e5f\u4e0d\u4f1a\u51ed\u7a7a\u6d88\u5931\uff0c\u5b83\u53ea\u4f1a\u4ece\u4e00\u79cd\u5f62\u5f0f\u8f6c\u5316\u4e3a\u5176\u5b83\u5f62\u5f0f\uff0c\u6216\u8005\u4ece\u4e00\u4e2a\u7269\u4f53\u8f6c\u79fb\u5230\u53e6\u4e00\u4e2a\u7269\u4f53\uff0c\u800c\u80fd\u7684\u603b\u91cf\u4fdd\u6301\u4e0d\u53d8\u3002
\u5341\u3001\u7535\u8def
\u2488\u7535\u8def\u7531\u7535\u6e90\u3001\u7535\u952e\u3001\u7528\u7535\u5668\u3001\u5bfc\u7ebf\u7b49\u5143\u4ef6\u7ec4\u6210\u3002\u8981\u4f7f\u7535\u8def\u4e2d\u6709\u6301\u7eed\u7535\u6d41\uff0c\u7535\u8def\u4e2d\u5fc5\u987b\u6709\u7535\u6e90\uff0c\u4e14\u7535\u8def\u5e94\u95ed\u5408\u7684\u3002 \u7535\u8def\u6709\u901a\u8def\u3001\u65ad\u8def\uff08\u5f00\u8def\uff09\u3001\u7535\u6e90\u548c\u7528\u7535\u5668\u77ed\u8def\u7b49\u73b0\u8c61\u3002
\u2489\u5bb9\u6613\u5bfc\u7535\u7684\u7269\u8d28\u53eb\u5bfc\u4f53\u3002\u5982\u91d1\u5c5e\u3001\u9178\u3001\u78b1\u3001\u76d0\u7684\u6c34\u6eb6\u6db2\u3002\u4e0d\u5bb9\u6613\u5bfc\u7535\u7684\u7269\u8d28\u53eb\u7edd\u7f18\u4f53\u3002\u5982\u6728\u5934\u3001\u73bb\u7483\u7b49\u3002
\u7edd\u7f18\u4f53\u5728\u4e00\u5b9a\u6761\u4ef6\u4e0b\u53ef\u4ee5\u8f6c\u5316\u4e3a\u5bfc\u4f53\u3002
\u248a\u4e32\u3001\u5e76\u8054\u7535\u8def\u7684\u8bc6\u522b\uff1a\u4e32\u8054\uff1a\u7535\u6d41\u4e0d\u5206\u53c9\uff0c\u5e76\u8054\uff1a\u7535\u6d41\u6709\u5206\u53c9\u3002
\u3010\u628a\u975e\u6807\u51c6\u7535\u8def\u56fe\u8f6c\u5316\u4e3a\u6807\u51c6\u7684\u7535\u8def\u56fe\u7684\u65b9\u6cd5\uff1a\u91c7\u7528\u7535\u6d41\u6d41\u5f84\u6cd5\u3002\u3011
\u5341\u4e00\u3001\u7535\u6d41\u5b9a\u5f8b
\u2488\u7535\u91cfQ\uff1a\u7535\u8377\u7684\u591a\u5c11\u53eb\u7535\u91cf\uff0c\u5355\u4f4d\uff1a\u5e93\u4ed1\u3002
\u7535\u6d41I\uff1a1\u79d2\u949f\u5185\u901a\u8fc7\u5bfc\u4f53\u6a2a\u622a\u9762\u7684\u7535\u91cf\u53eb\u505a\u7535\u6d41\u5f3a\u5ea6\u3002 Q=It
\u7535\u6d41\u5355\u4f4d\uff1a\u5b89\u57f9(A) 1\u5b89\u57f9=1000\u6beb\u5b89 \u6b63\u7535\u8377\u5b9a\u5411\u79fb\u52a8\u7684\u65b9\u5411\u89c4\u5b9a\u4e3a\u7535\u6d41\u65b9\u5411\u3002
\u6d4b\u91cf\u7535\u6d41\u7528\u7535\u6d41\u8868\uff0c\u4e32\u8054\u5728\u7535\u8def\u4e2d\uff0c\u5e76\u8003\u8651\u91cf\u7a0b\u9002\u5408\u3002\u4e0d\u5141\u8bb8\u628a\u7535\u6d41\u8868\u76f4\u63a5\u63a5\u5728\u7535\u6e90\u4e24\u7aef\u3002
\u2489\u7535\u538bU\uff1a\u4f7f\u7535\u8def\u4e2d\u7684\u81ea\u7531\u7535\u8377\u4f5c\u5b9a\u5411\u79fb\u52a8\u5f62\u6210\u7535\u6d41\u7684\u539f\u56e0\u3002\u7535\u538b\u5355\u4f4d\uff1a\u4f0f\u7279(V)\u3002
\u6d4b\u91cf\u7535\u538b\u7528\u7535\u538b\u8868(\u4f0f\u7279\u8868)\uff0c\u5e76\u8054\u5728\u7535\u8def\uff08\u7528\u7535\u5668\u3001\u7535\u6e90\uff09\u4e24\u7aef\uff0c\u5e76\u8003\u8651\u91cf\u7a0b\u9002\u5408\u3002
\u248a\u7535\u963bR\uff1a\u5bfc\u7535\u7269\u4f53\u5bf9\u7535\u6d41\u7684\u963b\u788d\u4f5c\u7528\u3002\u7b26\u53f7\uff1aR\uff0c\u5355\u4f4d\uff1a\u6b27\u59c6\u3001\u5343\u6b27\u3001\u5146\u6b27\u3002
\u7535\u963b\u5927\u5c0f\u8ddf\u5bfc\u7ebf\u957f\u5ea6\u6210\u6b63\u6bd4\uff0c\u6a2a\u622a\u9762\u79ef\u6210\u53cd\u6bd4\uff0c\u8fd8\u4e0e\u6750\u6599\u6709\u5173\u3002\u3010 \u3011
\u5bfc\u4f53\u7535\u963b\u4e0d\u540c\uff0c\u4e32\u8054\u5728\u7535\u8def\u4e2d\u65f6\uff0c\u7535\u6d41\u76f8\u540c\uff081\u22361\uff09\u3002 \u5bfc\u4f53\u7535\u963b\u4e0d\u540c\uff0c\u5e76\u8054\u5728\u7535\u8def\u4e2d\u65f6\uff0c\u7535\u538b\u76f8\u540c\uff081:1\uff09
\u248b\u6b27\u59c6\u5b9a\u5f8b\uff1a\u516c\u5f0f\uff1aI\uff1dU\uff0fR U\uff1dIR R\uff1dU\uff0fI
\u5bfc\u4f53\u4e2d\u7684\u7535\u6d41\u5f3a\u5ea6\u8ddf\u5bfc\u4f53\u4e24\u7aef\u7535\u538b\u6210\u6b63\u6bd4\uff0c\u8ddf\u5bfc\u4f53\u7684\u7535\u963b\u6210\u53cd\u6bd4\u3002
\u5bfc\u4f53\u7535\u963bR\uff1dU\uff0fI\u3002\u5bf9\u4e00\u786e\u5b9a\u7684\u5bfc\u4f53\u82e5\u7535\u538b\u53d8\u5316\u3001\u7535\u6d41\u4e5f\u53d1\u751f\u53d8\u5316\uff0c\u4f46\u7535\u963b\u503c\u4e0d\u53d8\u3002
\u248c\u4e32\u8054\u7535\u8def\u7279\u70b9\uff1a
\u2460 I\uff1dI1\uff1dI2 \u2461 U\uff1dU1\uff0bU2 \u2462 R\uff1dR1\uff0bR2 \u2463 U1\uff0fR1\uff1dU2\uff0fR2
\u7535\u963b\u4e0d\u540c\u7684\u4e24\u5bfc\u4f53\u4e32\u8054\u540e\uff0c\u7535\u963b\u8f83\u5927\u7684\u4e24\u7aef\u7535\u538b\u8f83\u5927\uff0c\u4e24\u7aef\u7535\u538b\u8f83\u5c0f\u7684\u5bfc\u4f53\u7535\u963b\u8f83\u5c0f\u3002
\u4f8b\u9898\uff1a\u4e00\u53ea\u6807\u6709\u201c6V\u30013W\u201d\u7535\u706f\uff0c\u63a5\u5230\u6807\u67098\u4f0f\u7535\u8def\u4e2d\uff0c\u5982\u4f55\u8054\u63a5\u4e00\u4e2a\u591a\u5927\u7535\u963b\uff0c\u624d\u80fd\u4f7f\u5c0f\u706f\u6ce1\u6b63\u5e38\u53d1\u5149\uff1f
\u89e3\uff1a\u7531\u4e8eP\uff1d3\u74e6\uff0cU\uff1d6\u4f0f
\u2234I\uff1dP\uff0fU\uff1d3\u74e6\uff0f6\u4f0f\uff1d0.5\u5b89
\u7531\u4e8e\u603b\u7535\u538b8\u4f0f\u5927\u4e8e\u7535\u706f\u989d\u5b9a\u7535\u538b6\u4f0f\uff0c\u5e94\u4e32\u8054\u4e00\u53ea\u7535\u963bR2 \u5982\u53f3\u56fe\uff0c
\u56e0\u6b64U2\uff1dU\uff0dU1\uff1d8\u4f0f\uff0d6\u4f0f\uff1d2\u4f0f
\u2234R2\uff1dU2\uff0fI\uff1d2\u4f0f\uff0f0.5\u5b89\uff1d4\u6b27\u3002\u7b54\uff1a\uff08\u7565\uff09
\u248d\u5e76\u8054\u7535\u8def\u7279\u70b9\uff1a
\u2460U\uff1dU1\uff1dU2 \u2461I\uff1dI1\uff0bI2 \u24621/R\uff1d1/R1+1/R2 \u6216 \u2463I1R1\uff1dI2R2
\u7535\u963b\u4e0d\u540c\u7684\u4e24\u5bfc\u4f53\u5e76\u8054\uff1a\u7535\u963b\u8f83\u5927\u7684\u901a\u8fc7\u7684\u7535\u6d41\u8f83\u5c0f\uff0c\u901a\u8fc7\u7535\u6d41\u8f83\u5927\u7684\u5bfc\u4f53\u7535\u963b\u5c0f\u3002
\u4f8b\uff1a\u5982\u56feR2\uff1d6\u6b27,K\u65ad\u5f00\u65f6\u5b89\u57f9\u8868\u7684\u793a\u6570\u4e3a0.4\u5b89\uff0cK\u95ed\u5408\u65f6\uff0cA\u8868\u793a\u6570\u4e3a1.2\u5b89\u3002\u6c42\uff1a\u2460R1\u963b\u503c \u2461\u7535\u6e90\u7535\u538b \u2462\u603b\u7535\u963b
\u5df2\u77e5\uff1aI\uff1d1.2\u5b89 I1\uff1d0.4\u5b89 R2=6\u6b27
\u6c42\uff1aR1\uff1bU\uff1bR
\u89e3\uff1a\u2235R1\u3001R2\u5e76\u8054
\u2234I2\uff1dI-I1=1.2\u5b89-0.4\u5b89=0.8\u5b89
\u6839\u636e\u6b27\u59c6\u5b9a\u5f8bU2=I2R2=0.8\u5b89\u00d76\u6b27=4.8\u4f0f
\u53c8\u2235R1\u3001R2\u5e76\u8054 \u2234U=U1=U2=4.8\u4f0f
\u2234R1\uff1dU1\uff0fI1\uff1d4.8\u4f0f\uff0f0.4\u5b89\uff1d12\u6b27
\u2234R\uff1dU\uff0fI\uff1d4.8\u4f0f\uff0f1.2\u5b89\uff1d4\u6b27 (\u6216\u5229\u7528\u516c\u5f0f \u8ba1\u7b97\u603b\u7535\u963b) \u7b54\uff1a\uff08\u7565\uff09
\u5341\u4e8c\u3001\u7535\u80fd
\u2488\u7535\u529fW\uff1a\u7535\u6d41\u6240\u505a\u7684\u529f\u53eb\u7535\u529f\u3002\u7535\u6d41\u4f5c\u529f\u8fc7\u7a0b\u5c31\u662f\u7535\u80fd\u8f6c\u5316\u4e3a\u5176\u5b83\u5f62\u5f0f\u7684\u80fd\u3002
\u516c\u5f0f\uff1aW\uff1dUQ W\uff1dUIt=U2t/R=I2Rt W\uff1dPt \u5355\u4f4d\uff1aW\u7126 U\u4f0f\u7279 I\u5b89\u57f9 t\u79d2 Q\u5e93 P\u74e6\u7279
\u2489\u7535\u529f\u7387P\uff1a\u7535\u6d41\u5728\u5355\u4f4d\u65f6\u95f4\u5185\u6240\u4f5c\u7684\u7535\u529f\uff0c\u8868\u793a\u7535\u6d41\u4f5c\u529f\u7684\u5feb\u6162\u3002\u3010\u7535\u529f\u7387\u5927\u7684\u7528\u7535\u5668\u7535\u6d41\u4f5c\u529f\u5feb\u3002\u3011
\u516c\u5f0f\uff1aP\uff1dW/t P\uff1dUI (P\uff1dU2/R P\uff1dI2R) \u5355\u4f4d\uff1aW\u7126 U\u4f0f\u7279 I\u5b89\u57f9 t\u79d2 Q\u5e93 P\u74e6\u7279
\u248a\u7535\u80fd\u8868\uff08\u74e6\u65f6\u8ba1\uff09\uff1a\u6d4b\u91cf\u7528\u7535\u5668\u6d88\u8017\u7535\u80fd\u7684\u4eea\u8868\u30021\u5ea6\u7535\uff1d1\u5343\u74e6\u65f6\uff1d1000\u74e6\u00d73600\u79d2=3.6\u00d7106\u7126\u8033
\u4f8b\uff1a1\u5ea6\u7535\u53ef\u4f7f\u4e8c\u53ea\u201c220V\u300140W\u201d\u7535\u706f\u5de5\u4f5c\u51e0\u5c0f\u65f6\uff1f
\u89e3 t\uff1dW/P\uff1d1\u5343\u74e6\u65f6/\uff082\u00d740\u74e6\uff09\uff1d1000\u74e6\u65f6/80\u74e6=12.5\u5c0f\u65f6
\u5341\u4e09\u3001\u78c1
1\uff0e\u78c1\u4f53\u3001\u78c1\u6781\u3010\u540c\u540d\u78c1\u6781\u4e92\u76f8\u6392\u65a5\uff0c\u5f02\u540d\u78c1\u6781\u4e92\u76f8\u5438\u5f15\u3011
\u7269\u4f53\u80fd\u591f\u5438\u5f15\u94c1\u3001\u94b4\u3001\u954d\u7b49\u7269\u8d28\u7684\u6027\u8d28\u53eb\u78c1\u6027\u3002\u5177\u6709\u78c1\u6027\u7684\u7269\u8d28\u53eb\u78c1\u4f53\u3002\u78c1\u4f53\u7684\u78c1\u6781\u603b\u662f\u6210\u5bf9\u51fa\u73b0\u7684\u3002
2\uff0e\u78c1\u573a\uff1a\u78c1\u4f53\u5468\u56f4\u7a7a\u95f4\u5b58\u5728\u7740\u4e00\u4e2a\u5bf9\u5176\u5b83\u78c1\u4f53\u53d1\u751f\u4f5c\u7528\u7684\u533a\u57df\u3002
\u78c1\u573a\u7684\u57fa\u672c\u6027\u8d28\u662f\u5bf9\u653e\u5165\u5176\u4e2d\u7684\u78c1\u4f53\u4ea7\u751f\u78c1\u529b\u7684\u4f5c\u7528\u3002
\u78c1\u573a\u65b9\u5411\uff1a\u5c0f\u78c1\u9488\u9759\u6b62\u65f6N\u6781\u6240\u6307\u7684\u65b9\u5411\u5c31\u662f\u8be5\u70b9\u7684\u78c1\u573a\u65b9\u5411\u3002\u78c1\u4f53\u5468\u56f4\u78c1\u573a\u7528\u78c1\u611f\u7ebf\u6765\u8868\u793a\u3002
\u5730\u78c1\u5317\u6781\u5728\u5730\u7406\u5357\u6781\u9644\u8fd1\uff0c\u5730\u78c1\u5357\u6781\u5728\u5730\u7406\u5317\u6781\u9644\u8fd1\u3002
3\uff0e\u7535\u6d41\u7684\u78c1\u573a\uff1a\u5965\u65af\u7279\u5b9e\u9a8c\u8868\u660e\u7535\u6d41\u5468\u56f4\u5b58\u5728\u78c1\u573a\u3002
\u901a\u7535\u87ba\u7ebf\u7ba1\u5bf9\u5916\u76f8\u5f53\u4e8e\u4e00\u4e2a\u6761\u5f62\u78c1\u94c1\u3002
\u901a\u7535\u87ba\u7ebf\u7ba1\u4e2d\u7535\u6d41\u7684\u65b9\u5411\u4e0e\u87ba\u7ebf\u7ba1\u4e24\u7aef\u6781\u6027\u7684\u5173\u7cfb\u53ef\u4ee5\u7528\u53f3\u624b\u87ba\u65cb\u5b9a\u5219\u6765\u5224\u5b9a\u3002
\u53c2\u7167\u7269\uff1a\u5224\u65ad\u4e00\u4e2a\u7269\u4f53\u8fd0\u52a8\u5fc5\u987b\u9009\u53d6\u53e6\u4e00\u4e2a\u7269\u4f53\u4f5c\u6807\u51c6\uff0c\u8fd9\u4e2a\u88ab\u9009\u4f5c\u6807\u51c6\u7684\u7269\u4f53\u53eb\u53c2\u7167\u7269\u3002
\u2489\u5300\u901f\u76f4\u7ebf\u8fd0\u52a8\uff1a
\u2460\u6bd4\u8f83\u8fd0\u52a8\u5feb\u6162\u7684\u4e24\u79cd\u65b9\u6cd5\uff1aa \u6bd4\u8f83\u5728\u76f8\u7b49\u65f6\u95f4\u91cc\u901a\u8fc7\u7684\u8def\u7a0b\u3002b \u6bd4\u8f83\u901a\u8fc7\u76f8\u7b49\u8def\u7a0b\u6240\u9700\u7684\u65f6\u95f4\u3002
\u2461\u516c\u5f0f\uff1a 1\u7c73\uff0f\u79d2\uff1d3.6\u5343\u7c73\uff0f\u65f6\u3002
\u4e09\u3001\u529b
\u2488\u529bF\uff1a\u529b\u662f\u7269\u4f53\u5bf9\u7269\u4f53\u7684\u4f5c\u7528\u3002\u7269\u4f53\u95f4\u529b\u7684\u4f5c\u7528\u603b\u662f\u76f8\u4e92\u7684\u3002
\u529b\u7684\u5355\u4f4d\uff1a\u725b\u987f\uff08N\uff09\u3002\u6d4b\u91cf\u529b\u7684\u4eea\u5668\uff1a\u6d4b\u529b\u5668\uff1b\u5b9e\u9a8c\u5ba4\u4f7f\u7528\u5f39\u7c27\u79e4\u3002
\u529b\u7684\u4f5c\u7528\u6548\u679c\uff1a\u4f7f\u7269\u4f53\u53d1\u751f\u5f62\u53d8\u6216\u4f7f\u7269\u4f53\u7684\u8fd0\u52a8\u72b6\u6001\u53d1\u751f\u6539\u53d8\u3002
\u7269\u4f53\u8fd0\u52a8\u72b6\u6001\u6539\u53d8\u662f\u6307\u7269\u4f53\u7684\u901f\u5ea6\u5927\u5c0f\u6216\u8fd0\u52a8\u65b9\u5411\u6539\u53d8\u3002
\u2489\u529b\u7684\u4e09\u8981\u7d20\uff1a\u529b\u7684\u5927\u5c0f\u3001\u65b9\u5411\u3001\u4f5c\u7528\u70b9\u53eb\u505a\u529b\u7684\u4e09\u8981\u7d20\u3002
\u529b\u7684\u56fe\u793a\uff0c\u8981\u4f5c\u6807\u5ea6\uff1b\u529b\u7684\u793a\u610f\u56fe\uff0c\u4e0d\u4f5c\u6807\u5ea6\u3002
\u248a\u91cd\u529bG\uff1a\u7531\u4e8e\u5730\u7403\u5438\u5f15\u800c\u4f7f\u7269\u4f53\u53d7\u5230\u7684\u529b\u3002\u65b9\u5411\uff1a\u7ad6\u76f4\u5411\u4e0b\u3002
\u91cd\u529b\u548c\u8d28\u91cf\u5173\u7cfb\uff1aG=mg m=G/g
g=9.8\u725b\uff0f\u5343\u514b\u3002\u8bfb\u6cd5\uff1a9.8\u725b\u6bcf\u5343\u514b\uff0c\u8868\u793a\u8d28\u91cf\u4e3a1\u5343\u514b\u7269\u4f53\u6240\u53d7\u91cd\u529b\u4e3a9.8\u725b\u3002
\u91cd\u5fc3\uff1a\u91cd\u529b\u7684\u4f5c\u7528\u70b9\u53eb\u505a\u7269\u4f53\u7684\u91cd\u5fc3\u3002\u89c4\u5219\u7269\u4f53\u7684\u91cd\u5fc3\u5728\u7269\u4f53\u7684\u51e0\u4f55\u4e2d\u5fc3\u3002
\u248b\u4e8c\u529b\u5e73\u8861\u6761\u4ef6\uff1a\u4f5c\u7528\u5728\u540c\u4e00\u7269\u4f53\uff1b\u4e24\u529b\u5927\u5c0f\u76f8\u7b49\uff0c\u65b9\u5411\u76f8\u53cd\uff1b\u4f5c\u7528\u5728\u4e00\u76f4\u7ebf\u4e0a\u3002
\u7269\u4f53\u5728\u4e8c\u529b\u5e73\u8861\u4e0b\uff0c\u53ef\u4ee5\u9759\u6b62\uff0c\u4e5f\u53ef\u4ee5\u4f5c\u5300\u901f\u76f4\u7ebf\u8fd0\u52a8\u3002
\u7269\u4f53\u7684\u5e73\u8861\u72b6\u6001\u662f\u6307\u7269\u4f53\u5904\u4e8e\u9759\u6b62\u6216\u5300\u901f\u76f4\u7ebf\u8fd0\u52a8\u72b6\u6001\u3002\u5904\u4e8e\u5e73\u8861\u72b6\u6001\u7684\u7269\u4f53\u6240\u53d7\u5916\u529b\u7684\u5408\u529b\u4e3a\u96f6\u3002
\u248c\u540c\u4e00\u76f4\u7ebf\u4e8c\u529b\u5408\u6210\uff1a\u65b9\u5411\u76f8\u540c\uff1a\u5408\u529bF=F1+F2 ;\u5408\u529b\u65b9\u5411\u4e0eF1\u3001F2\u65b9\u5411\u76f8\u540c\uff1b
\u65b9\u5411\u76f8\u53cd\uff1a\u5408\u529bF=F1-F2\uff0c\u5408\u529b\u65b9\u5411\u4e0e\u5927\u7684\u529b\u65b9\u5411\u76f8\u540c\u3002
\u248d\u76f8\u540c\u6761\u4ef6\u4e0b\uff0c\u6eda\u52a8\u6469\u64e6\u529b\u6bd4\u6ed1\u52a8\u6469\u64e6\u529b\u5c0f\u5f97\u591a\u3002
\u6ed1\u52a8\u6469\u64e6\u529b\u4e0e\u6b63\u538b\u529b\uff0c\u63a5\u89e6\u9762\u6750\u6599\u6027\u8d28\u548c\u7c97\u7cd9\u7a0b\u5ea6\u6709\u5173\u3002\u3010\u6ed1\u52a8\u6469\u64e6\u3001\u6eda\u52a8\u6469\u64e6\u3001\u9759\u6469\u64e6\u3011
7\uff0e\u725b\u987f\u7b2c\u4e00\u5b9a\u5f8b\u4e5f\u79f0\u4e3a\u60ef\u6027\u5b9a\u5f8b\u5176\u5185\u5bb9\u662f\uff1a\u4e00\u5207\u7269\u4f53\u5728\u4e0d\u53d7\u5916\u529b\u4f5c\u7528\u65f6\uff0c\u603b\u4fdd\u6301\u9759\u6b62\u6216\u5300\u901f\u76f4\u7ebf\u8fd0\u52a8\u72b6\u6001\u3002 \u60ef\u6027\uff1a\u7269\u4f53\u5177\u6709\u4fdd\u6301\u539f\u6765\u7684\u9759\u6b62\u6216\u5300\u901f\u76f4\u7ebf\u8fd0\u52a8\u72b6\u6001\u7684\u6027\u8d28\u53eb\u505a\u60ef\u6027\u3002
\u56db\u3001\u5bc6\u5ea6
\u2488\u5bc6\u5ea6\u03c1\uff1a\u67d0\u79cd\u7269\u8d28\u5355\u4f4d\u4f53\u79ef\u7684\u8d28\u91cf\uff0c\u5bc6\u5ea6\u662f\u7269\u8d28\u7684\u4e00\u79cd\u7279\u6027\u3002
\u516c\u5f0f\uff1a m=\u03c1V \u56fd\u9645\u5355\u4f4d\uff1a\u5343\u514b\uff0f\u7c733 \uff0c\u5e38\u7528\u5355\u4f4d\uff1a\u514b\uff0f\u5398\u7c733\uff0c
\u5173\u7cfb\uff1a1\u514b\uff0f\u5398\u7c733\uff1d1\u00d7103\u5343\u514b\uff0f\u7c733\uff1b\u03c1\u6c34\uff1d1\u00d7103\u5343\u514b\uff0f\u7c733\uff1b
\u8bfb\u6cd5\uff1a103\u5343\u514b\u6bcf\u7acb\u65b9\u7c73\uff0c\u8868\u793a1\u7acb\u65b9\u7c73\u6c34\u7684\u8d28\u91cf\u4e3a103\u5343\u514b\u3002
\u2489\u5bc6\u5ea6\u6d4b\u5b9a\uff1a\u7528\u6258\u76d8\u5929\u5e73\u6d4b\u8d28\u91cf\uff0c\u91cf\u7b52\u6d4b\u56fa\u4f53\u6216\u6db2\u4f53\u7684\u4f53\u79ef\u3002
\u9762\u79ef\u5355\u4f4d\u6362\u7b97\uff1a
1\u5398\u7c732=1\u00d710-4\u7c732\uff0c
1\u6beb\u7c732=1\u00d710-6\u7c732\u3002
\u4e94\u3001\u538b\u5f3a
\u2488\u538b\u5f3aP\uff1a\u7269\u4f53\u5355\u4f4d\u9762\u79ef\u4e0a\u53d7\u5230\u7684\u538b\u529b\u53eb\u505a\u538b\u5f3a\u3002
\u538b\u529bF\uff1a\u5782\u76f4\u4f5c\u7528\u5728\u7269\u4f53\u8868\u9762\u4e0a\u7684\u529b\uff0c\u5355\u4f4d\uff1a\u725b\uff08N\uff09\u3002
\u538b\u529b\u4ea7\u751f\u7684\u6548\u679c\u7528\u538b\u5f3a\u5927\u5c0f\u8868\u793a\uff0c\u8ddf\u538b\u529b\u5927\u5c0f\u3001\u53d7\u529b\u9762\u79ef\u5927\u5c0f\u6709\u5173\u3002
\u538b\u5f3a\u5355\u4f4d\uff1a\u725b/\u7c732\uff1b\u4e13\u95e8\u540d\u79f0\uff1a\u5e15\u65af\u5361\uff08Pa\uff09
\u516c\u5f0f\uff1a F=PS \u3010S\uff1a\u53d7\u529b\u9762\u79ef\uff0c\u4e24\u7269\u4f53\u63a5\u89e6\u7684\u516c\u5171\u90e8\u5206\uff1b\u5355\u4f4d\uff1a\u7c732\u3002\u3011
\u6539\u53d8\u538b\u5f3a\u5927\u5c0f\u65b9\u6cd5\uff1a\u2460\u51cf\u5c0f\u538b\u529b\u6216\u589e\u5927\u53d7\u529b\u9762\u79ef\uff0c\u53ef\u4ee5\u51cf\u5c0f\u538b\u5f3a\uff1b\u2461\u589e\u5927\u538b\u529b\u6216\u51cf\u5c0f\u53d7\u529b\u9762\u79ef\uff0c\u53ef\u4ee5\u589e\u5927\u538b\u5f3a\u3002
\u2489\u6db2\u4f53\u5185\u90e8\u538b\u5f3a\uff1a\u3010\u6d4b\u91cf\u6db2\u4f53\u5185\u90e8\u538b\u5f3a\uff1a\u4f7f\u7528\u6db2\u4f53\u538b\u5f3a\u8ba1\uff08U\u578b\u7ba1\u538b\u5f3a\u8ba1\uff09\u3002\u3011
\u4ea7\u751f\u539f\u56e0\uff1a\u7531\u4e8e\u6db2\u4f53\u6709\u91cd\u529b\uff0c\u5bf9\u5bb9\u5668\u5e95\u4ea7\u751f\u538b\u5f3a\uff1b\u7531\u4e8e\u6db2\u4f53\u6d41\u52a8\u6027\uff0c\u5bf9\u5668\u58c1\u4ea7\u751f\u538b\u5f3a\u3002
\u89c4\u5f8b\uff1a\u2460\u540c\u4e00\u6df1\u5ea6\u5904\uff0c\u5404\u4e2a\u65b9\u5411\u4e0a\u538b\u5f3a\u5927\u5c0f\u76f8\u7b49\u2461\u6df1\u5ea6\u8d8a\u5927\uff0c\u538b\u5f3a\u4e5f\u8d8a\u5927\u2462\u4e0d\u540c\u6db2\u4f53\u540c\u4e00\u6df1\u5ea6\u5904\uff0c\u6db2\u4f53\u5bc6\u5ea6\u5927\u7684\uff0c\u538b\u5f3a\u4e5f\u5927\u3002 [\u6df1\u5ea6h\uff0c\u6db2\u9762\u5230\u6db2\u4f53\u67d0\u70b9\u7684\u7ad6\u76f4\u9ad8\u5ea6\u3002]
\u516c\u5f0f\uff1aP=\u03c1gh h\uff1a\u5355\u4f4d\uff1a\u7c73\uff1b \u03c1\uff1a\u5343\u514b\uff0f\u7c733\uff1b g=9.8\u725b\uff0f\u5343\u514b\u3002
\u248a\u5927\u6c14\u538b\u5f3a\uff1a\u5927\u6c14\u53d7\u5230\u91cd\u529b\u4f5c\u7528\u4ea7\u751f\u538b\u5f3a\uff0c\u8bc1\u660e\u5927\u6c14\u538b\u5b58\u5728\u4e14\u5f88\u5927\u7684\u662f\u9a6c\u5fb7\u5821\u534a\u7403\u5b9e\u9a8c\uff0c\u6d4b\u5b9a\u5927\u6c14\u538b\u5f3a\u6570\u503c\u7684\u662f\u6258\u91cc\u62c6\u5229\uff08\u610f\u5927\u5229\u79d1\u5b66\u5bb6\uff09\u3002\u6258\u91cc\u62c6\u5229\u7ba1\u503e\u659c\u540e\uff0c\u6c34\u94f6\u67f1\u9ad8\u5ea6\u4e0d\u53d8\uff0c\u957f\u5ea6\u53d8\u957f\u3002
1\u4e2a\u6807\u51c6\u5927\u6c14\u538b\uff1d76\u5398\u7c73\u6c34\u94f6\u67f1\u9ad8\uff1d1.01\u00d7105\u5e15\uff1d10.336\u7c73\u6c34\u67f1\u9ad8
\u6d4b\u5b9a\u5927\u6c14\u538b\u7684\u4eea\u5668\uff1a\u6c14\u538b\u8ba1\uff08\u6c34\u94f6\u6c14\u538b\u8ba1\u3001\u76d2\u5f0f\u6c14\u538b\u8ba1\uff09\u3002
\u5927\u6c14\u538b\u5f3a\u968f\u9ad8\u5ea6\u53d8\u5316\u89c4\u5f8b\uff1a\u6d77\u62d4\u8d8a\u9ad8\uff0c\u6c14\u538b\u8d8a\u5c0f\uff0c\u5373\u968f\u9ad8\u5ea6\u589e\u52a0\u800c\u51cf\u5c0f\uff0c\u6cb8\u70b9\u4e5f\u964d\u4f4e\u3002
\u516d\u3001\u6d6e\u529b
1\uff0e\u6d6e\u529b\u53ca\u4ea7\u751f\u539f\u56e0\uff1a\u6d78\u5728\u6db2\u4f53\uff08\u6216\u6c14\u4f53\uff09\u4e2d\u7684\u7269\u4f53\u53d7\u5230\u6db2\u4f53\uff08\u6216\u6c14\u4f53\uff09\u5bf9\u5b83\u5411\u4e0a\u6258\u7684\u529b\u53eb\u6d6e\u529b\u3002\u65b9\u5411\uff1a\u7ad6\u76f4\u5411\u4e0a\uff1b\u539f\u56e0\uff1a\u6db2\u4f53\u5bf9\u7269\u4f53\u7684\u4e0a\u3001\u4e0b\u538b\u529b\u5dee\u3002
2\uff0e\u963f\u57fa\u7c73\u5fb7\u539f\u7406\uff1a\u6d78\u5728\u6db2\u4f53\u91cc\u7684\u7269\u4f53\u53d7\u5230\u5411\u4e0a\u7684\u6d6e\u529b\uff0c\u6d6e\u529b\u5927\u5c0f\u7b49\u4e8e\u7269\u4f53\u6392\u5f00\u6db2\u4f53\u6240\u53d7\u91cd\u529b\u3002
\u5373F\u6d6e\uff1dG\u6db2\u6392\uff1d\u03c1\u6db2gV\u6392\u3002 \uff08V\u6392\u8868\u793a\u7269\u4f53\u6392\u5f00\u6db2\u4f53\u7684\u4f53\u79ef\uff09
3\uff0e\u6d6e\u529b\u8ba1\u7b97\u516c\u5f0f\uff1aF\u6d6e\uff1dG-T\uff1d\u03c1\u6db2gV\u6392\uff1dF\u4e0a\u3001\u4e0b\u538b\u529b\u5dee
4\uff0e\u5f53\u7269\u4f53\u6f02\u6d6e\u65f6\uff1aF\u6d6e\uff1dG\u7269 \u4e14 \u03c1\u7269<\u03c1\u6db2 \u5f53\u7269\u4f53\u60ac\u6d6e\u65f6\uff1aF\u6d6e\uff1dG\u7269 \u4e14 \u03c1\u7269=\u03c1\u6db2
\u5f53\u7269\u4f53\u4e0a\u6d6e\u65f6\uff1aF\u6d6e>G\u7269 \u4e14 \u03c1\u7269\u03c1\u6db2
\u4e03\u3001\u7b80\u5355\u673a\u68b0
\u2488\u6760\u6746\u5e73\u8861\u6761\u4ef6\uff1aF1l1\uff1dF2l2\u3002\u529b\u81c2\uff1a\u4ece\u652f\u70b9\u5230\u529b\u7684\u4f5c\u7528\u7ebf\u7684\u5782\u76f4\u8ddd\u79bb
\u901a\u8fc7\u8c03\u8282\u6760\u6746\u4e24\u7aef\u87ba\u6bcd\u4f7f\u6760\u6746\u5904\u4e8e\u6c34\u4f4d\u7f6e\u7684\u76ee\u7684\uff1a\u4fbf\u4e8e\u76f4\u63a5\u6d4b\u5b9a\u52a8\u529b\u81c2\u548c\u963b\u529b\u81c2\u7684\u957f\u5ea6\u3002
\u5b9a\u6ed1\u8f6e\uff1a\u76f8\u5f53\u4e8e\u7b49\u81c2\u6760\u6746\uff0c\u4e0d\u80fd\u7701\u529b\uff0c\u4f46\u80fd\u6539\u53d8\u7528\u529b\u7684\u65b9\u5411\u3002
\u52a8\u6ed1\u8f6e\uff1a\u76f8\u5f53\u4e8e\u52a8\u529b\u81c2\u662f\u963b\u529b\u81c22\u500d\u7684\u6760\u6746\uff0c\u80fd\u7701\u4e00\u534a\u529b\uff0c\u4f46\u4e0d\u80fd\u6539\u53d8\u7528\u529b\u65b9\u5411\u3002
\u2489\u529f\uff1a\u4e24\u4e2a\u5fc5\u8981\u56e0\u7d20\uff1a\u2460\u4f5c\u7528\u5728\u7269\u4f53\u4e0a\u7684\u529b\uff1b\u2461\u7269\u4f53\u5728\u529b\u65b9\u5411\u4e0a\u901a\u8fc7\u8ddd\u79bb\u3002W\uff1dFS \u529f\u7684\u5355\u4f4d\uff1a\u7126\u8033
3\uff0e\u529f\u7387\uff1a\u7269\u4f53\u5728\u5355\u4f4d\u65f6\u95f4\u91cc\u6240\u505a\u7684\u529f\u3002\u8868\u793a\u7269\u4f53\u505a\u529f\u7684\u5feb\u6162\u7684\u7269\u7406\u91cf\uff0c\u5373\u529f\u7387\u5927\u7684\u7269\u4f53\u505a\u529f\u5feb\u3002
W=Pt P\u7684\u5355\u4f4d\uff1a\u74e6\u7279\uff1b W\u7684\u5355\u4f4d\uff1a\u7126\u8033\uff1b t\u7684\u5355\u4f4d\uff1a\u79d2\u3002
\u516b\u3001\u5149
\u2488\u5149\u7684\u76f4\u7ebf\u4f20\u64ad\uff1a\u5149\u5728\u540c\u4e00\u79cd\u5747\u5300\u4ecb\u8d28\u4e2d\u662f\u6cbf\u76f4\u7ebf\u4f20\u64ad\u7684\u3002\u5c0f\u5b54\u6210\u50cf\u3001\u5f71\u5b50\u3001\u5149\u6591\u662f\u5149\u7684\u76f4\u7ebf\u4f20\u64ad\u73b0\u8c61\u3002
\u5149\u5728\u771f\u7a7a\u4e2d\u7684\u901f\u5ea6\u6700\u5927\u4e3a3\u00d7108\u7c73\uff0f\u79d2\uff1d3\u00d7105\u5343\u7c73\uff0f\u79d2
\u2489\u5149\u7684\u53cd\u5c04\u5b9a\u5f8b:\u4e00\u9762\u4e8c\u4fa7\u4e09\u7b49\u5927\u3002\u3010\u5165\u5c04\u5149\u7ebf\u548c\u6cd5\u7ebf\u95f4\u7684\u5939\u89d2\u662f\u5165\u5c04\u89d2\u3002\u53cd\u5c04\u5149\u7ebf\u548c\u6cd5\u7ebf\u95f4\u5939\u89d2\u662f\u53cd\u5c04\u89d2\u3002\u3011
\u5e73\u9762\u955c\u6210\u50cf\u7279\u70b9\uff1a\u865a\u50cf\uff0c\u7b49\u5927\uff0c\u7b49\u8ddd\u79bb\uff0c\u4e0e\u955c\u9762\u5bf9\u79f0\u3002\u7269\u4f53\u5728\u6c34\u4e2d\u5012\u5f71\u662f\u865a\u50cf\u5c5e\u5149\u7684\u53cd\u5c04\u73b0\u8c61\u3002
\u248a\u5149\u7684\u6298\u5c04\u73b0\u8c61\u548c\u89c4\u5f8b\uff1a \u770b\u5230\u6c34\u4e2d\u7b77\u5b50\u3001\u9c7c\u7684\u865a\u50cf\u662f\u5149\u7684\u6298\u5c04\u73b0\u8c61\u3002
\u51f8\u900f\u955c\u5bf9\u5149\u6709\u4f1a\u805a\u5149\u7ebf\u4f5c\u7528\uff0c\u51f9\u900f\u955c\u5bf9\u5149\u6709\u53d1\u6563\u5149\u7ebf\u4f5c\u7528\u3002 \u5149\u7684\u6298\u5c04\u5b9a\u5f8b\uff1a\u4e00\u9762\u4e8c\u4fa7\u4e09\u968f\u5927\u56db\u7a7a\u5927\u3002
\u248b\u51f8\u900f\u955c\u6210\u50cf\u89c4\u5f8b\uff1a[U=f\u65f6\u4e0d\u6210\u50cf U=2f\u65f6 V=2f\u6210\u5012\u7acb\u7b49\u5927\u7684\u5b9e\u50cf]
\u7269\u8dddu \u50cf\u8dddv \u50cf\u7684\u6027\u8d28 \u5149\u8def\u56fe \u5e94\u7528
u>2f f<v<2f \u5012\u7f29\u5c0f\u5b9e \u7167\u76f8\u673a
f2f \u5012\u653e\u5927\u5b9e \u5e7b\u706f\u673a
u<f \u653e\u5927\u6b63\u865a \u653e\u5927\u955c
\u248c\u51f8\u900f\u955c\u6210\u50cf\u5b9e\u9a8c\uff1a\u5c06\u8721\u70db\u3001\u51f8\u900f\u955c\u3001\u5149\u5c4f\u4f9d\u6b21\u653e\u5728\u5149\u5177\u5ea7\u4e0a\uff0c\u4f7f\u70db\u7130\u4e2d\u5fc3\u3001\u51f8\u900f\u955c\u4e2d\u5fc3\u3001\u5149\u5c4f\u4e2d\u5fc3\u5728\u540c\u4e00\u4e2a\u9ad8\u5ea6\u4e0a\u3002
\u4e5d\u3001\u70ed\u5b66\uff1a
\u2488\u6e29\u5ea6t\uff1a\u8868\u793a\u7269\u4f53\u7684\u51b7\u70ed\u7a0b\u5ea6\u3002\u3010\u662f\u4e00\u4e2a\u72b6\u6001\u91cf\u3002\u3011
\u5e38\u7528\u6e29\u5ea6\u8ba1\u539f\u7406\uff1a\u6839\u636e\u6db2\u4f53\u70ed\u80c0\u51b7\u7f29\u6027\u8d28\u3002
\u6e29\u5ea6\u8ba1\u4e0e\u4f53\u6e29\u8ba1\u7684\u4e0d\u540c\u70b9\uff1a\u2460\u91cf\u7a0b\uff0c\u2461\u6700\u5c0f\u523b\u5ea6\uff0c\u2462\u73bb\u7483\u6ce1\u3001\u5f2f\u66f2\u7ec6\u7ba1\uff0c\u2463\u4f7f\u7528\u65b9\u6cd5\u3002
\u2489\u70ed\u4f20\u9012\u6761\u4ef6\uff1a\u6709\u6e29\u5ea6\u5dee\u3002\u70ed\u91cf\uff1a\u5728\u70ed\u4f20\u9012\u8fc7\u7a0b\u4e2d\uff0c\u7269\u4f53\u5438\u6536\u6216\u653e\u51fa\u70ed\u7684\u591a\u5c11\u3002\u3010\u662f\u8fc7\u7a0b\u91cf\u3011
\u70ed\u4f20\u9012\u7684\u65b9\u5f0f\uff1a\u4f20\u5bfc\uff08\u70ed\u6cbf\u7740\u7269\u4f53\u4f20\u9012\uff09\u3001\u5bf9\u6d41\uff08\u9760\u6db2\u4f53\u6216\u6c14\u4f53\u7684\u6d41\u52a8\u5b9e\u73b0\u70ed\u4f20\u9012\uff09\u548c\u8f90\u5c04\uff08\u9ad8\u6e29\u7269\u4f53\u76f4\u63a5\u5411\u5916\u53d1\u5c04\u51fa\u70ed\uff09\u4e09\u79cd\u3002
\u248a\u6c7d\u5316\uff1a\u7269\u8d28\u4ece\u6db2\u6001\u53d8\u6210\u6c14\u6001\u7684\u73b0\u8c61\u3002\u65b9\u5f0f\uff1a\u84b8\u53d1\u548c\u6cb8\u817e\uff0c\u6c7d\u5316\u8981\u5438\u70ed\u3002
\u5f71\u54cd\u84b8\u53d1\u5feb\u6162\u56e0\u7d20\uff1a\u2460\u6db2\u4f53\u6e29\u5ea6\uff0c\u2461\u6db2\u4f53\u8868\u9762\u79ef\uff0c\u2462\u6db2\u4f53\u8868\u9762\u7a7a\u6c14\u6d41\u52a8\u3002\u84b8\u53d1\u6709\u81f4\u51b7\u4f5c\u7528\u3002
\u248b\u6bd4\u70ed\u5bb9C\uff1a\u5355\u4f4d\u8d28\u91cf\u7684\u67d0\u79cd\u7269\u8d28\uff0c\u6e29\u5ea6\u5347\u9ad81\u2103\u65f6\u5438\u6536\u7684\u70ed\u91cf\uff0c\u53eb\u505a\u8fd9\u79cd\u7269\u8d28\u7684\u6bd4\u70ed\u5bb9\u3002
\u6bd4\u70ed\u5bb9\u662f\u7269\u8d28\u7684\u7279\u6027\u4e4b\u4e00\uff0c\u5355\u4f4d\uff1a\u7126\uff0f\uff08\u5343\u514b\u2103\uff09 \u5e38\u89c1\u7269\u8d28\u4e2d\u6c34\u7684\u6bd4\u70ed\u5bb9\u6700\u5927\u3002
C\u6c34\uff1d4.2\u00d7103\u7126\uff0f\uff08\u5343\u514b\u2103\uff09 \u8bfb\u6cd5\uff1a4.2\u00d7103\u7126\u8033\u6bcf\u5343\u514b\u6444\u6c0f\u5ea6\u3002
\u7269\u7406\u542b\u4e49\uff1a\u8868\u793a\u8d28\u91cf\u4e3a1\u5343\u514b\u6c34\u6e29\u5ea6\u5347\u9ad81\u2103\u5438\u6536\u70ed\u91cf\u4e3a4.2\u00d7103\u7126\u3002
\u248c\u70ed\u91cf\u8ba1\u7b97\uff1aQ\u653e\uff1dcm\u22bft\u964d Q\u5438\uff1dcm\u22bft\u5347
Q\u4e0ec\u3001m\u3001\u22bft\u6210\u6b63\u6bd4\uff0cc\u3001m\u3001\u22bft\u4e4b\u95f4\u6210\u53cd\u6bd4\u3002\u22bft=Q/cm
6\uff0e\u5185\u80fd\uff1a\u7269\u4f53\u5185\u6240\u6709\u5206\u5b50\u7684\u52a8\u80fd\u548c\u5206\u5b50\u52bf\u80fd\u7684\u603b\u548c\u3002\u4e00\u5207\u7269\u4f53\u90fd\u6709\u5185\u80fd\u3002\u5185\u80fd\u5355\u4f4d\uff1a\u7126\u8033
\u7269\u4f53\u7684\u5185\u80fd\u4e0e\u7269\u4f53\u7684\u6e29\u5ea6\u6709\u5173\u3002\u7269\u4f53\u6e29\u5ea6\u5347\u9ad8\uff0c\u5185\u80fd\u589e\u5927\uff1b\u6e29\u5ea6\u964d\u4f4e\u5185\u80fd\u51cf\u5c0f\u3002
\u6539\u53d8\u7269\u4f53\u5185\u80fd\u7684\u65b9\u6cd5\uff1a\u505a\u529f\u548c\u70ed\u4f20\u9012\uff08\u5bf9\u6539\u53d8\u7269\u4f53\u5185\u80fd\u662f\u7b49\u6548\u7684\uff09
7\uff0e\u80fd\u7684\u8f6c\u5316\u548c\u5b88\u6052\u5b9a\u5f8b\uff1a\u80fd\u91cf\u5373\u4e0d\u4f1a\u51ed\u7a7a\u4ea7\u751f\uff0c\u4e5f\u4e0d\u4f1a\u51ed\u7a7a\u6d88\u5931\uff0c\u5b83\u53ea\u4f1a\u4ece\u4e00\u79cd\u5f62\u5f0f\u8f6c\u5316\u4e3a\u5176\u5b83\u5f62\u5f0f\uff0c\u6216\u8005\u4ece\u4e00\u4e2a\u7269\u4f53\u8f6c\u79fb\u5230\u53e6\u4e00\u4e2a\u7269\u4f53\uff0c\u800c\u80fd\u7684\u603b\u91cf\u4fdd\u6301\u4e0d\u53d8\u3002
\u5341\u3001\u7535\u8def
\u2488\u7535\u8def\u7531\u7535\u6e90\u3001\u7535\u952e\u3001\u7528\u7535\u5668\u3001\u5bfc\u7ebf\u7b49\u5143\u4ef6\u7ec4\u6210\u3002\u8981\u4f7f\u7535\u8def\u4e2d\u6709\u6301\u7eed\u7535\u6d41\uff0c\u7535\u8def\u4e2d\u5fc5\u987b\u6709\u7535\u6e90\uff0c\u4e14\u7535\u8def\u5e94\u95ed\u5408\u7684\u3002 \u7535\u8def\u6709\u901a\u8def\u3001\u65ad\u8def\uff08\u5f00\u8def\uff09\u3001\u7535\u6e90\u548c\u7528\u7535\u5668\u77ed\u8def\u7b49\u73b0\u8c61\u3002
\u2489\u5bb9\u6613\u5bfc\u7535\u7684\u7269\u8d28\u53eb\u5bfc\u4f53\u3002\u5982\u91d1\u5c5e\u3001\u9178\u3001\u78b1\u3001\u76d0\u7684\u6c34\u6eb6\u6db2\u3002\u4e0d\u5bb9\u6613\u5bfc\u7535\u7684\u7269\u8d28\u53eb\u7edd\u7f18\u4f53\u3002\u5982\u6728\u5934\u3001\u73bb\u7483\u7b49\u3002
\u7edd\u7f18\u4f53\u5728\u4e00\u5b9a\u6761\u4ef6\u4e0b\u53ef\u4ee5\u8f6c\u5316\u4e3a\u5bfc\u4f53\u3002
\u248a\u4e32\u3001\u5e76\u8054\u7535\u8def\u7684\u8bc6\u522b\uff1a\u4e32\u8054\uff1a\u7535\u6d41\u4e0d\u5206\u53c9\uff0c\u5e76\u8054\uff1a\u7535\u6d41\u6709\u5206\u53c9\u3002
\u3010\u628a\u975e\u6807\u51c6\u7535\u8def\u56fe\u8f6c\u5316\u4e3a\u6807\u51c6\u7684\u7535\u8def\u56fe\u7684\u65b9\u6cd5\uff1a\u91c7\u7528\u7535\u6d41\u6d41\u5f84\u6cd5\u3002\u3011
\u5341\u4e00\u3001\u7535\u6d41\u5b9a\u5f8b
\u2488\u7535\u91cfQ\uff1a\u7535\u8377\u7684\u591a\u5c11\u53eb\u7535\u91cf\uff0c\u5355\u4f4d\uff1a\u5e93\u4ed1\u3002
\u7535\u6d41I\uff1a1\u79d2\u949f\u5185\u901a\u8fc7\u5bfc\u4f53\u6a2a\u622a\u9762\u7684\u7535\u91cf\u53eb\u505a\u7535\u6d41\u5f3a\u5ea6\u3002 Q=It
\u7535\u6d41\u5355\u4f4d\uff1a\u5b89\u57f9(A) 1\u5b89\u57f9=1000\u6beb\u5b89 \u6b63\u7535\u8377\u5b9a\u5411\u79fb\u52a8\u7684\u65b9\u5411\u89c4\u5b9a\u4e3a\u7535\u6d41\u65b9\u5411\u3002
\u6d4b\u91cf\u7535\u6d41\u7528\u7535\u6d41\u8868\uff0c\u4e32\u8054\u5728\u7535\u8def\u4e2d\uff0c\u5e76\u8003\u8651\u91cf\u7a0b\u9002\u5408\u3002\u4e0d\u5141\u8bb8\u628a\u7535\u6d41\u8868\u76f4\u63a5\u63a5\u5728\u7535\u6e90\u4e24\u7aef\u3002
\u2489\u7535\u538bU\uff1a\u4f7f\u7535\u8def\u4e2d\u7684\u81ea\u7531\u7535\u8377\u4f5c\u5b9a\u5411\u79fb\u52a8\u5f62\u6210\u7535\u6d41\u7684\u539f\u56e0\u3002\u7535\u538b\u5355\u4f4d\uff1a\u4f0f\u7279(V)\u3002
\u6d4b\u91cf\u7535\u538b\u7528\u7535\u538b\u8868(\u4f0f\u7279\u8868)\uff0c\u5e76\u8054\u5728\u7535\u8def\uff08\u7528\u7535\u5668\u3001\u7535\u6e90\uff09\u4e24\u7aef\uff0c\u5e76\u8003\u8651\u91cf\u7a0b\u9002\u5408\u3002
\u248a\u7535\u963bR\uff1a\u5bfc\u7535\u7269\u4f53\u5bf9\u7535\u6d41\u7684\u963b\u788d\u4f5c\u7528\u3002\u7b26\u53f7\uff1aR\uff0c\u5355\u4f4d\uff1a\u6b27\u59c6\u3001\u5343\u6b27\u3001\u5146\u6b27\u3002
\u7535\u963b\u5927\u5c0f\u8ddf\u5bfc\u7ebf\u957f\u5ea6\u6210\u6b63\u6bd4\uff0c\u6a2a\u622a\u9762\u79ef\u6210\u53cd\u6bd4\uff0c\u8fd8\u4e0e\u6750\u6599\u6709\u5173\u3002\u3010 \u3011
\u5bfc\u4f53\u7535\u963b\u4e0d\u540c\uff0c\u4e32\u8054\u5728\u7535\u8def\u4e2d\u65f6\uff0c\u7535\u6d41\u76f8\u540c\uff081\u22361\uff09\u3002 \u5bfc\u4f53\u7535\u963b\u4e0d\u540c\uff0c\u5e76\u8054\u5728\u7535\u8def\u4e2d\u65f6\uff0c\u7535\u538b\u76f8\u540c\uff081:1\uff09
\u248b\u6b27\u59c6\u5b9a\u5f8b\uff1a\u516c\u5f0f\uff1aI\uff1dU\uff0fR U\uff1dIR R\uff1dU\uff0fI
\u5bfc\u4f53\u4e2d\u7684\u7535\u6d41\u5f3a\u5ea6\u8ddf\u5bfc\u4f53\u4e24\u7aef\u7535\u538b\u6210\u6b63\u6bd4\uff0c\u8ddf\u5bfc\u4f53\u7684\u7535\u963b\u6210\u53cd\u6bd4\u3002
\u5bfc\u4f53\u7535\u963bR\uff1dU\uff0fI\u3002\u5bf9\u4e00\u786e\u5b9a\u7684\u5bfc\u4f53\u82e5\u7535\u538b\u53d8\u5316\u3001\u7535\u6d41\u4e5f\u53d1\u751f\u53d8\u5316\uff0c\u4f46\u7535\u963b\u503c\u4e0d\u53d8\u3002
\u248c\u4e32\u8054\u7535\u8def\u7279\u70b9\uff1a
\u2460 I\uff1dI1\uff1dI2 \u2461 U\uff1dU1\uff0bU2 \u2462 R\uff1dR1\uff0bR2 \u2463 U1\uff0fR1\uff1dU2\uff0fR2
\u7535\u963b\u4e0d\u540c\u7684\u4e24\u5bfc\u4f53\u4e32\u8054\u540e\uff0c\u7535\u963b\u8f83\u5927\u7684\u4e24\u7aef\u7535\u538b\u8f83\u5927\uff0c\u4e24\u7aef\u7535\u538b\u8f83\u5c0f\u7684\u5bfc\u4f53\u7535\u963b\u8f83\u5c0f\u3002
\u4f8b\u9898\uff1a\u4e00\u53ea\u6807\u6709\u201c6V\u30013W\u201d\u7535\u706f\uff0c\u63a5\u5230\u6807\u67098\u4f0f\u7535\u8def\u4e2d\uff0c\u5982\u4f55\u8054\u63a5\u4e00\u4e2a\u591a\u5927\u7535\u963b\uff0c\u624d\u80fd\u4f7f\u5c0f\u706f\u6ce1\u6b63\u5e38\u53d1\u5149\uff1f
\u89e3\uff1a\u7531\u4e8eP\uff1d3\u74e6\uff0cU\uff1d6\u4f0f
\u2234I\uff1dP\uff0fU\uff1d3\u74e6\uff0f6\u4f0f\uff1d0.5\u5b89
\u7531\u4e8e\u603b\u7535\u538b8\u4f0f\u5927\u4e8e\u7535\u706f\u989d\u5b9a\u7535\u538b6\u4f0f\uff0c\u5e94\u4e32\u8054\u4e00\u53ea\u7535\u963bR2 \u5982\u53f3\u56fe\uff0c
\u56e0\u6b64U2\uff1dU\uff0dU1\uff1d8\u4f0f\uff0d6\u4f0f\uff1d2\u4f0f
\u2234R2\uff1dU2\uff0fI\uff1d2\u4f0f\uff0f0.5\u5b89\uff1d4\u6b27\u3002\u7b54\uff1a\uff08\u7565\uff09
\u248d\u5e76\u8054\u7535\u8def\u7279\u70b9\uff1a
\u2460U\uff1dU1\uff1dU2 \u2461I\uff1dI1\uff0bI2 \u24621/R\uff1d1/R1+1/R2 \u6216 \u2463I1R1\uff1dI2R2
我国安全电压标准规定的交流电安全电压等级:
1、42V(空载上限小于等于50V)可供有触电危险的场所使用的手持式电动工具等场合下使用;
2、36V(空载上限小于等于43V),可在矿井、多导电粉尘等场所使用的行灯等场合下使用;
3、24V、12V、6V(空载上限分别小于或等于29V、15V、8V)三档可供某些人体可能偶然触及的带电体的设备选用。在大型锅炉内工作、金属容器内工作或者在发器内工作,为了确保人身安全一定要使用12V或6V低压行灯。当电气设备采用24V以上安全电压时,必须采取防止直接接触带电体的。其电路必须与大地绝缘。
所以:ABCD均是安全电压
BCD
一般环境条件下允许持续接触的安全电压是36V及以下。
CC
C
绛旓細鎹濮嗗畾寰嬶紝鐢靛帇瓒婇珮锛岀數娴佷篃灏辫秺澶с傚洜姝わ紝鍙互鎶婂彲鑳藉姞鍦ㄤ汉韬辩殑鐢靛帇闄愬埗鍦ㄦ煇涓鑼冨洿涔嬪唴锛屼娇寰楀湪杩欑鐢靛帇涓嬶紝閫氳繃浜轰綋鐨勭數娴佷笉瓒呰繃鍏佽鐨勮寖鍥淬傝繖涓鐢靛帇灏卞彨鍋氬畨鍏ㄧ數鍘嬶紝涔熷彨鍋氬畨鍏ㄧ壒浣庣數鍘嬨傚簲褰撴寚鍑猴紝浠讳綍鎯呭喌涓嬮兘涓嶈鎶婂畨鍏ㄧ數鍘嬬悊瑙d负缁濆娌℃湁鍗遍櫓鐨勭數鍘嬨傚叿鏈瀹夊叏鐢靛帇鐨璁惧灞炰簬鈪㈢被璁惧銆1锛庡畨鍏...
绛旓細36V 瀹夊叏鐢靛帇鏄鎸囦笉鑷翠娇浜虹洿鎺ヨ嚧姝绘垨鑷存畫鐨勭數鍘嬶紝涓鑸幆澧冩潯浠朵笅鍏佽鎸佺画鎺ヨЕ鐨勨滃畨鍏ㄧ壒浣庣數鍘嬧濇槸36V銆傝涓氳瀹氬畨鍏ㄧ數鍘嬩负涓嶉珮浜36V锛屾寔缁帴瑙﹀畨鍏ㄧ數鍘嬩负24V锛屽畨鍏ㄧ數娴佷负10mA锛 鐢靛嚮瀵逛汉浣撶殑鍗卞绋嬪害锛屼富瑕佸彇鍐充簬閫氳繃浜轰綋鐢垫祦鐨勫ぇ灏忓拰閫氱數鏃堕棿闀跨煭銆
绛旓細琛屼笟瑙勫畾 瀹夊叏鐢靛帇 涓36V锛屽畨鍏ㄧ數娴 涓10mA锛屽師鍥犲涓嬶細鐢靛嚮瀵逛汉浣撶殑鍗卞绋嬪害锛屼富瑕佸彇鍐充簬閫氳繃浜轰綋鐢垫祦鐨勫ぇ灏忓拰閫氱數鏃堕棿闀跨煭銆傜數娴佸己搴 瓒婂ぇ锛岃嚧鍛藉嵄闄╄秺澶э紱鎸佺画鏃堕棿瓒婇暱锛屾浜$殑鍙兘鎬ц秺澶с傝兘寮曡捣浜烘劅瑙夊埌鐨勬渶灏忕數娴佸肩О涓烘劅鐭ョ數娴侊紝浜ゆ祦涓1mA锛岀洿娴佷负5mA锛涗汉瑙︾數鍚庤兘鑷繁鎽嗚劚鐨 鏈澶х數娴 绉颁负鎽嗚劚...
绛旓細鍦ㄥ悇绉嶄笉鍚岀幆澧冩潯浠朵笅锛屼汉浣撴帴瑙﹀埌涓瀹鐢靛帇鐨甯︾數浣撳悗锛屽叾鍚勯儴鍒嗕笉鍙戠敓浠讳綍鎹熷锛岃鐢靛帇绉颁负瀹夊叏鐢靛帇銆瀹夊叏鐢靛帇鏄浠ヤ汉浣撳厑璁搁氳繃鐨勭數娴佷笌浜轰綋鐢甸樆鐨勪箻绉潵琛ㄧず鐨勩傞氬父锛屼綆浜40V鐨勫鍦扮數鍘嬪彲瑙嗕负瀹夊叏鐢靛帇銆傚浗闄呯數宸ュ鍛樹細瑙勫畾鎺ヨЕ鐢靛帇鐨勯檺瀹氬间负50V锛屽苟瑙勫畾鍦25V浠ヤ笅鏃讹紝涓嶉渶鑰冭檻闃叉鐢靛嚮鐨勫畨鍏ㄦ帾鏂姐傛垜鍥...
绛旓細7銆佹垜鍥借瀹(42)銆(36)銆(24)銆(12)銆(6)涓瀹夊叏鐢靛帇銆傚湪娼箍鐜涓簲浣跨敤(12)浼浠ヤ笅銆 8銆10000璧珮棰戜氦娴佺數鐨勬劅鐭ョ數娴,鐢锋х害(1.5)姣畨,濂虫х害涓(0.6)姣畨;骞冲潎鎽嗚劚鐢垫祦,鐢锋х害涓(16)姣畨,濂虫х害涓(10.5)姣畨銆 9銆佷竴鑸潵璇,瑙︾數褰㈠紡鏈(鎺ヨЕ瑙︾數)銆(鎰熷簲瑙︾數)鍜(璺ㄦ鐢靛帇瑙︾數)涓夌銆 10銆侀潚銆佷腑骞...
绛旓細琛屼笟瑙勫畾 瀹夊叏鐢靛帇涓轰笉楂樹簬36V锛屾寔缁帴瑙﹀畨鍏ㄧ數鍘嬩负24V锛屽畨鍏ㄧ數娴佷负10mA锛 鐢靛嚮瀵逛汉浣撶殑鍗卞绋嬪害锛屼富瑕佸彇鍐充簬閫氳繃浜轰綋鐢垫祦鐨勫ぇ灏忓拰閫氱數鏃堕棿闀跨煭銆傜數娴佸己搴﹁秺澶э紝鑷村懡鍗遍櫓瓒婂ぇ锛涙寔缁椂闂磋秺闀匡紝姝讳骸鐨勫彲鑳芥ц秺澶с傝兘寮曡捣浜烘劅瑙夊埌鐨勬渶灏忕數娴佸肩О涓烘劅鐭ョ數娴侊紝浜ゆ祦涓1mA锛岀洿娴佷负5mA锛涗汉瑙︾數鍚庤兘鑷繁鎽嗚劚鐨勬渶...
绛旓細瀹夊叏鐢靛帇灏鏄鎴戜滑鐢熸椿涓甯哥殑瀹夊叏鐢靛帇锛屼竴鑸綆鐢靛帇鏄220浼忕殑銆
绛旓細鍦ㄧ幇浠gぞ浼氫腑锛岀數鍣ㄤ骇鍝佺殑浣跨敤宸茬粡涓嶅彲閬垮厤锛屽鐢靛帇鐨勫畨鍏鎬у氨鏄惧緱灏や负閲嶈銆傞氬父鏉ヨ锛屼汉浣撹兘澶熸壙鍙楃殑鐢靛帇涓婇檺涓50浼浠ヤ笅銆傚ぇ浜50浼忕殑鐢垫祦浼氬浜轰綋閫犳垚浼ゅ銆傚湪瀹跺涵鐢熸椿涓紝鎴戜滑搴旇鐗瑰埆娉ㄦ剰瀹剁數鐢垫簮寮鍏崇殑浣跨敤锛屼互閬垮厤涓嶅繀瑕佺殑鐢靛嚮浜嬫晠鐨勫彂鐢熴傚浜庨偅浜涗粠浜嬬數宸ュ伐浣滅殑浜烘潵璇达紝瑕佹厧閲嶅寰呴珮鍘嬬數娴侊紝蹇呴』绌挎埓...
绛旓細鐢靛伐鑰冭瘯涓紝鐗瑰湴鐢靛帇鎸鐨勬槸瀹夊叏鐢靛帇锛岄氬父鏈36V24V12V6V绛夈
绛旓細涓嶇浜ょ洿娴佺數鍘嬶紝鍙灏忎簬36V灏鏄畨鍏ㄧ數鍘銆傛纭悊瑙b滃畨鍏ㄧ數鍘嬧濊鏈腑璇达細鈥滈氳繃浜轰綋鐨勭數娴佸ぇ灏忓喅瀹氫簬澶栧姞鐢靛帇鍜屼汉浣撶數闃汇傗︹︾粡楠岃瘉鏄庯紝鍙湁涓嶉珮浜36浼忕殑鐢靛帇鎵嶆槸瀹夊叏鐨勩傗濇垜浠父鎶36浼忕壒浠ヤ笅鐨鐢靛帇鍙仛瀹夊叏鐢靛帇銆備负浠涔堟妸36浼忚瀹氫负瀹夊叏鐢靛帇鐨鐣岄檺鍛紵鍘熸潵浜轰綋閫氳繃5姣畨浠ヤ笅鐨勭數娴佹椂锛屽彧浜х敓鈥滈夯鐢碘...