物理知识点 初中物理知识点总结

\u521d\u4e2d\u7269\u7406\u77e5\u8bc6\u70b9















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\u4e00\u3001\u521d\u4e2d\u7269\u7406\u5149\u7684\u53cd\u5c04\u6982\u5ff5
\u5149\u7684\u53cd\u5c04\u5b9a\u5f8b\u6982\u5ff5\uff1a\u5149\u5728\u4e24\u79cd\u7269\u8d28\u5206\u754c\u9762\u4e0a\u6539\u53d8\u4f20\u64ad\u65b9\u5411\u53c8\u8fd4\u56de\u539f\u6765\u7269\u8d28\u4e2d\u7684\u73b0\u8c61\uff0c\u53eb\u505a\u5149\u7684\u53cd\u5c04\u3002\u5bf9\u4eba\u7c7b\u6765\u8bf4\uff0c\u5149\u7684\u6700\u5927\u89c4\u6a21\u7684\u53cd\u5c04\u73b0\u8c61\uff0c\u53d1\u751f\u5728\u6708\u7403\u4e0a\u3002\u4eba\u4eec\u77e5\u9053\uff0c\u6708\u7403\u672c\u8eab\u662f\u4e0d\u53d1\u5149\u7684\uff0c\u5b83\u53ea\u662f\u53cd\u5c04\u592a\u9633\u7684\u5149\u3002\u56e0\u6b64\u5149\u7684\u53cd\u5c04\u65e0\u5904\u4e0d\u5728\u5e76\u53d1\u751f\u5728\u4eba\u4eec\u8eab\u8fb9\u3002
\u4e8c\u3001\u521d\u4e2d\u7269\u7406\u5149\u7684\u53cd\u5c04\u5206\u7c7b
1\uff09\u955c\u9762\u53cd\u5c04\uff1a\u5e73\u884c\u5149\u7ebf\u5c04\u5230\u5149\u6ed1\u8868\u9762\u4e0a\u65f6\u53cd\u5c04\u5149\u7ebf\u4e5f\u662f\u5e73\u884c\u7684\uff0c\u8fd9\u79cd\u53cd\u5c04\u53eb\u505a\u955c\u9762\u53cd\u5c04\u3002
2\uff09\u6f2b\u53cd\u5c04\uff1a\u5e73\u884c\u5149\u7ebf\u5c04\u5230\u51f9\u51f8\u4e0d\u5e73\u7684\u8868\u9762\u4e0a\uff0c\u53cd\u5c04\u5149\u7ebf\u5c04\u5411\u5404\u4e2a\u65b9\u5411\uff0c\u8fd9\u79cd\u53cd\u5c04\u53eb\u505a\u6f2b\u53cd\u5c04\u3002
3\uff09\u955c\u9762\u53cd\u5c04\u4e0e\u6f2b\u53cd\u5c04\u7269\u7406\u73b0\u8c61\uff1a\u8868\u9762\u5e73\u6ed1\u7684\u7269\u4f53\uff0c\u6613\u5f62\u6210\u5149\u7684\u955c\u9762\u53cd\u5c04\uff0c\u5f62\u6210\u523a\u76ee\u7684\u5f3a\u5149\uff0c\u53cd\u800c\u770b\u4e0d\u6e05\u695a\u7269\u4f53\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\u53ef\u4ee5\u8fa8\u522b\u7269\u4f53\u4e4b\u5f62\u72b6\u548c\u5b58\u5728\uff0c\u662f\u7531\u4e8e\u5149\u7684\u6f2b\u5c04\u4e4b\u6545\u3002\u65e5\u843d\u540e\u6682\u65f6\u80fd\u770b\u89c1\u7269\u4f53\uff0c\u4e43\u662f\u56e0\u4e3a\u7a7a\u6c14\u4e2d\u5c18\u57c3\u5f15\u8d77\u5149\u7684\u6f2b\u5c04\u4e4b\u6545\u3002\u65e0\u8bba\u662f\u955c\u9762\u53cd\u5c04\u6216\u6f2b\u53cd\u5c04\uff0c\u90fd\u9700\u9075\u5b88\u53cd\u5c04\u5b9a\u5f8b\u3002
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1.\u53cd\u5c04\u89d2\u7b49\u4e8e\u5165\u5c04\u89d2\uff0c\u4e14\u5165\u5c04\u5149\u7ebf\u4e0e\u5e73\u9762\u7684\u5939\u89d2\u7b49\u4e8e\u53cd\u5c04\u5149\u7ebf\u4e0e\u5e73\u9762\u7684\u5939\u89d2\u3002
2.\u53cd\u5c04\u5149\u7ebf\u4e0e\u5165\u5c04\u5149\u7ebf\u5c45\u4e8e\u6cd5\u7ebf\u4e24\u4fa7\u4e14\u90fd\u5728\u540c\u4e00\u4e2a\u5e73\u9762\u5185\u3002
3.\u5728\u5149\u7684\u53cd\u5c04\u73b0\u8c61\u4e2d\uff0c\u5149\u8def\u662f\u53ef\u9006\u7684\u3002 \u56db\u3001\u6839\u636e\u5149\u7684\u53cd\u5c04\u5b9a\u5f8b\u4f5c\u5149\u8def\u56fe\uff08\u5e38\u8003\u77e5\u8bc6\u70b9\uff09\uff1a
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1\uff0e\u5171\u9762 \u6cd5\u7ebf\u662f\u53cd\u5c04\u5149\u7ebf\u4e0e\u5165\u5c04\u5149\u7ebf\u7684\u89d2\u5e73\u5206\u7ebf\u6240\u5728\u7684\u76f4\u7ebf\u3002
2\uff0e\u5f02\u4fa7 \u5165\u5c04\u5149\u7ebf\u4e0e\u53cd\u5c04\u9762\u7684\u5939\u89d2\u548c\u5165\u5c04\u89d2\u7684\u548c\u4e3a90\u00b0
3\uff0e\u7b49\u89d2 \u53cd\u5c04\u89d2\u7b49\u4e8e\u5165\u5c04\u89d2\u3002\u53cd\u5c04\u89d2\u968f\u5165\u5c04\u89d2\u7684\u589e\u5927\u800c\u589e\u5927\uff0c\u51cf\u5c0f\u800c\u51cf\u5c0f\u3002
4\uff0e\u53ef\u9006 \u5149\u8def\u662f\u53ef\u9006\u7684
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1\u3001\u521d\u4e2d\u7269\u7406\u5149\u7684\u53cd\u5c04\u9009\u62e9\u9898
1\uff0e\u7535\u89c6\u673a\u9065\u63a7\u5668\u53ef\u4ee5\u53d1\u5c04\u4e00\u79cd\u4e0d\u53ef\u89c1\u5149\uff0c\u53eb\u505a\u7ea2\u5916\u7ebf\uff0c\u7528\u5b83\u6765\u4f20\u9012\u4fe1\u606f\uff0c\u5b9e\u73b0\u5bf9\u7535\u89c6\u673a\u7684\u9065\u63a7\u3002\u4e0d\u628a\u9065\u63a7\u5668\u5bf9\u51c6\u7535\u89c6\u673a\u7684\u63a7\u5236\u7a97\u53e3\uff0c\u6309\u4e00\u4e0b\u6309\u94ae\uff0c\u6709\u65f6\u4e5f\u53ef\u4ee5\u63a7\u5236\u7535\u89c6\u673a\uff0c\u8fd9\u662f\u5229\u7528\uff08 \uff09 A\uff0e\u5149\u7684\u76f4\u7ebf\u4f20\u64ad B\uff0e\u5149\u6cbf\u66f2\u7ebf\u4f20\u64ad C\uff0e\u5149\u7684\u53cd\u5c04 D\uff0e\u5149\u7684\u53ef\u9006\u6027
2\uff0e\u5149\u6c61\u67d3\u5df2\u6210\u4e3a21\u4e16\u7eaa\u4eba\u4eec\u5173\u6ce8\u7684\u95ee\u9898\u3002\u636e\u6d4b\u5b9a\uff0c\u5ba4\u5185\u6d01\u767d\u3001\u5e73\u6ed1\u7684\u5899\u58c1\u80fd\u5c06\u7167\u5c04\u5728\u5899\u58c1\u4e0a\u7684\u592a\u9633\u5149\u768480%\u53cd\u5c04\uff0c\u957f\u65f6\u95f4\u5728\u8fd9\u6837\u523a\u773c\u7684\u73af\u5883\u4e2d\u770b\u4e66\u5b66\u4e60\u4f1a\u611f\u5230\u5f88\u4e0d\u8212\u670d\u3002\u5982\u679c\u5c06\u5899\u58c1\u505a\u6210\u51f9\u51f8\u4e0d\u5e73\u7684\u9762\uff0c\u5176\u4f5c\u7528\u4e4b\u4e00\u53ef\u4ee5\u4f7f\u7167\u5c04\u5230\u5899\u58c1\u4e0a\u7684\u592a\u9633\u5149\u53d8\u6210\u6563\u5c04\u5149\uff0c\u8fbe\u5230\u4fdd\u62a4\u89c6\u529b\u7684\u76ee\u7684\uff0c\u8fd9\u662f\u5229\u7528\u4e86\u5149\u7684\uff08 \uff09 A\uff0e\u76f4\u7ebf\u4f20\u64ad B\uff0e\u6f2b\u53cd\u5c04 C\uff0e\u955c\u9762\u53cd\u5c04 D\uff0e\u53cd\u5c04
3\uff0e\u5982\u56fe1\u6240\u793a\uff0c\u4e00\u675f\u5149\u7ebf\u5c04\u5411\u5e73\u9762\u955c\uff0c\u90a3\u4e48\u8fd9\u675f\u5149\u7ebf\u7684\u5165\u5c04\u89d2\u548c\u53cd\u5c04\u89d2\u7684\u5927\u5c0f\u5206\u522b\u4e3a\uff08 \uff09 A\uff0e40\u00b0 40\u00b0 B\uff0e40\u00b0 50\u00b0 C\uff0e50\u00b0 40\u00b0 D\uff0e50\u00b0 50\u00b0 4\uff0e\u4e0b\u5217\u8bf4\u6cd5\u4e2d\u4e0d\u6b63\u786e\u7684\u662f\uff08 \uff09
A\uff0e\u5149\u7ebf\u5782\u76f4\u7167\u5c04\u5728\u5e73\u9762\u955c\u4e0a\uff0c\u5165\u5c04\u89d2\u662f90\u00b0
B\uff0e\u6f2b\u53cd\u5c04\u4e5f\u9075\u5b88\u53cd\u5c04\u5b9a\u5f8b
C\uff0e\u53cd\u5c04\u5149\u7ebf\u8ddf\u5165\u5c04\u5149\u7ebf\u7684\u5939\u89d2\u4e3a120\u00b0\uff0c\u5219\u5165\u5c04\u89d2\u4e3a60\u00b0
D\uff0e\u592a\u9633\u53d1\u51fa\u7684\u5149\u4f20\u5230\u5730\u7403\u7ea6\u9700500s\uff0c\u5219\u592a\u9633\u5230\u5730\u7403\u7684\u8ddd\u79bb\u7ea6\u4e3a1\uff0e5\u00d7108km
5\uff0e\u5c0f\u806a\u540c\u5b66\u901a\u8fc7\u67d0\u79cd\u9014\u5f84\u770b\u5230\u4e86\u5c0f\u660e\u540c\u5b66\u7684\u773c\u775b\uff0c\u5219\u5c0f\u660e\u540c\u5b66\uff08 \uff09 A\uff0e\u4e00\u5b9a\u80fd\u770b\u5230\u5c0f\u806a\u540c\u5b66\u7684\u773c\u775b B\uff0e\u4e00\u5b9a\u4e0d\u80fd\u770b\u5230\u5c0f\u806a\u540c\u5b66\u7684\u773c\u775b C\uff0e\u53ef\u80fd\u770b\u4e0d\u5230\u5c0f\u806a\u540c\u5b66\u7684\u773c\u775b D\uff0e\u4e00\u5b9a\u80fd\u770b\u5230\u5c0f\u806a\u540c\u5b66\u7684\u5168\u8eab 2\u3001\u521d\u4e2d\u7269\u7406\u5149\u7684\u53cd\u5c04\u5e94\u7528\u9898
1.\uff08\u521d\u4e2d\u7269\u7406\u5149\u7684\u53cd\u5c04\u4f5c\u56fe\u9898\uff09\u94b1\u5305\u6389\u5230\u6c99\u53d1\u4e0b\uff0e\u6ca1\u6709\u624b\u7535\u7b52\uff0c\u5c0f\u660e\u501f\u52a9\u5e73\u9762\u955c\u53cd\u5c04\u706f\u5149\u627e\u5230\u4e86\u94b1\u5305\uff0e\u56fe\u4e2d\u5df2\u6807\u793a\u4e86\u53cd\u5c04\u4e0e\u5165\u5c04\u5149\u7ebf\uff0c\u8bf7\u5728\u56fe\u4e2d\u6807\u51fa\u5e73\u9762\u955c\uff0c\u5e76\u753b\u51fa\u6cd5\u7ebf\u3002
2.\uff08\u521d\u4e2d\u7269\u7406\u5149\u7684\u53cd\u5c04\u5b9e\u9a8c\u9898\uff09\u5982\u56fe\u6240\u793a\uff0c\u662f\u9648\u6d9b\u540c\u5b66\u63a2\u7a76\u5149\u53cd\u5c04\u89c4\u5f8b\u7684\u5b9e\u9a8c\uff0e\u4ed6\u8fdb\u884c\u4e86\u4e0b\u9762\u7684\u64cd\u4f5c\uff1a
(1)\u5982\u56fe1\u7532\uff0c\u8ba9\u4e00\u675f\u5149\u8d34\u7740\u7eb8\u677f\u6cbf\u67d0\u4e00\u4e2a\u89d2\u5ea6\u5c04\u52300\u70b9\uff0c\u7ecf\u5e73\u9762\u955c\u7684\u53cd\u5c04\uff0c\u6cbf\u53e6\u4e00\u4e2a\u65b9\u5411\u5c04\u51fa\uff0c\u6539\u53d8\u5149\u675f\u7684\u5165\u5c04\u65b9\u5411\uff0c\u4f7f\u2220i\u51cf\u5c0f\uff0c\u8fd9\u65f6\u2220r\u8ddf\u7740\u51cf\u5c0f\uff0c\u4f7f\u2220 i\u589e\u5927\uff0c\u2220r\u8ddf\u7740\u589e\u5927\uff0c\u2220r\u603b\u662f_______\u2220i\uff0c\u8bf4\u660e__________
(2)\u5982\u56fe1\u4e59\uff0c\u628a\u534a\u9762\u7eb8\u677fNOF\u5411\u524d\u6298\u6216\u5411\u540e\u6298\uff0c\u8fd9\u65f6\uff0c\u5728NOF\u4e0a\u770b\u4e0d\u5230________-\uff0c\u8bf4\u660e
3\u3001\u521d\u4e2d\u7269\u7406\u5149\u7684\u53cd\u5c04\u5b9e\u9a8c\u9898________\u3002 \u53c2\u8003\u7b54\u6848\uff1a 1\u3001\u9009\u62e9\u9898\uff1a1\uff0eC 2\uff0eB 3\uff0eD 4\uff0eA 5\uff0eA
2\u3001\u5e94\u7528\u9898\uff1a1.\uff08\u5982\u56fe\u6240\u793a\uff09
2.\uff081\uff09\u5f71\u5b50\u7684\u5f62\u6210\uff1a\u5149\u6cbf\u76f4\u7ebf\u4f20\u64ad\uff1b\uff082\uff09\u6c34\u4e2d\u5012\u5f71\uff1a\u5149\u7684\u53cd\u5c04 \u4e03\u3001\u751f\u6d3b\u4e2d\u7684\u5149\u7684\u53cd\u5c04\u7269\u7406\u73b0\u8c61\uff1a
1\u3001\u6211\u4eec\u6bcf\u5929\u90fd\u7167\u7684\u955c\u5b50\u3002
2\u3001\u8def\u53e3\u653e\u7f6e\u7684\u51f8\u9762\u955c\u3002
3\u3001\u6c7d\u8f66\u7684\u89c2\u540e\u955c\u3002
4\u3001\u6211\u4eec\u80fd\u770b\u89c1\u7269\u4f53\uff0c\u7269\u4f53\u53cd\u5c04\u4e86\u5149\u8fdb\u5165\u6211\u4eec\u7684\u773c\u775b\u3002 5\u3001\u592a\u9633\u80fd\u52a0\u70ed\u5668\uff08\u592a\u9633\u7076\uff09
6\u3001\u6f5c\u671b\u955c\u3002
7\u3001\u53cd\u5c04\u5f0f\u7684\u671b\u8fdc\u955c\u3002
\u4e0a\u6d77\u5e02\u4e2d\u8003\u7269\u7406\u548c\u5316\u5b66\u5408\u5377\uff0c\u7269\u7406\u5206\u503c\u4e3a90\u5206\u3002\u5149\u7684\u6298\u5c04\u5bf9\u6bd4\u5149\u7684\u76f4\u7ebf\u4f20\u64ad\u548c\u5149\u7684\u53cd\u5c04\u6765\u8bf4\uff0c\u5219\u6709\u96be\u5ea6\u3002\u540c\u5b66\u4eec\u9700\u8981\u638c\u63e1\u5149\u7684\u6298\u5c04\u4f5c\u56fe\u9898\u548c\u5b9e\u9a8c\u9898\u76f8\u5173\u77e5\u8bc6\u70b9\u3002\u6602\u7acb\u65b0\u8bfe\u7a0b\u9488\u5bf9\u521d\u4e2d\u5404\u4e2a\u79d1\u5f00\u8bbe\u5982\u4e0b\u8bfe\u7a0b\uff1a
\u4ee5\u4e0a\u7279\u8272\u8bfe\u7a0b\u4e0e\u521d\u4e2d\u5b66\u79d1\u6559\u6750\u5339\u914d\uff0c\u6388\u8bfe\u5f62\u5f0f\u5206\u4e3a\u9762\u6388\u548c\u7f51\u8bfe\uff0c\u9762\u6388\u8bfe\u7a0b\u73ed\u578b\u8bbe\u7f6e\u4e0d\u540c\uff0c\u67091\u5bf91\uff0c1\u5bf93\uff0c15\u4eba\u73ed\uff0c30\u4eba\u73ed\u7b49\u5f62\u5f0f\uff0c\u4e0a\u6d77\u5e02\u5404\u533a\u6388\u8bfe\u65f6\u95f4\u4e5f\u4e0d\u540c\uff0c\u5177\u4f53\u8bfe\u7a0b\u8be6\u60c5\u8bf7\u62e8\u6253\u5b98\u7f51\u70ed\u7ebf4008-770-970\u54a8\u8be2\u3002

电势:在电场中,某点的电势的电荷的电势能跟它所带的电荷之比,叫做这点的电势。电势是从能量角度上描述电场的物理量。(电场强度则是从力的角度描述电场) 这个是相对的,跟选择的零势能点有关
电场强度:是描述电场的基本物理量。简称场强。电场的基本特征是能使其中的电荷受到作用力 ,电场中某一点的电场强度E 定义为放在该点的静止试验电荷所受的 f与其电量q的比值,即E =F/q但是这个是定义式,跟场强的大小没决定关系,只是在数值上相等。场源电荷Q与试探电荷q相距为r,则它们相互间的库仑力F=kQq/(r^2)=q*kQ/(r^2),所以电荷q处的电场强度E=F/q=kQ/(r^2)这个是决定式,场强也与产生电场的两极板间的电势差有关
场强就是电场强度!

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