并联电路中总电流怎么算？等于什么？ 电流的计算方法（串联和并联，详细点）
\u5e76\u8054\u7535\u8def\u4e2d\u7684\u603b\u7535\u6d41\u662f\u5426\u7b49\u4e8e\u4e32\u8054\u4e2d\u7684\u603b\u7535\u6d41\uff1f\u800c\u4e32\u8054\u7535\u8def\u548c\u5e76\u8054\u7535\u8def\u4e2d\u7684\u7535\u6d41\u53c8\u6709\u4ec0\u4e48\u4e0d\u540c\u5462
\u4e32\u8054\u7535\u8def\u4e2d\uff1aU=U1+U2\uff0cI=I1=I2
\u5e76\u8054\u7535\u8def\u4e2d\uff1aU=U1=U2\uff0cI=I1+I2
\u4ee5\u4e0a\u516c\u5f0f\u4e2d\uff1aU\u662f\u7535\u538b\uff0cI\u662f\u7535\u6d41\u3002
\u7535\u6d41\u7684\u65b9\u5411\u4e0e\u6b63\u7535\u8377\u5728\u7535\u8def\u4e2d\u79fb\u52a8\u7684\u65b9\u5411\u76f8\u540c\u3002\u5b9e\u9645\u4e0a\u5e76\u4e0d\u662f\u6b63\u7535\u8377\u79fb\u52a8\uff0c\u800c\u662f\u8d1f\u7535\u8377\u79fb\u52a8\u3002\u7535\u5b50\u6d41\u662f\u7535\u5b50\uff08\u8d1f\u7535\u8377)\u5728\u7535\u8def\u4e2d\u7684\u79fb\u52a8\uff0c\u5176\u65b9\u5411\u4e3a\u7535\u6d41\u7684\u53cd\u5411\u3002\u7535\u6d41\u5f3a\u5ea6\u53ef\u4ee5\u7528\u516c\u5f0f\u8868\u8fbe\u4e3a\uff1a
\u5176\u4e2d\uff0cQ\u4e3a\u7535\u91cf\uff08\u5355\u4f4d\u662f\u5e93\u4ed1\uff09\uff0ct\u4e3a\u65f6\u95f4\uff08\u5355\u4f4d\u662f\u79d2\uff09\u3002
\uff081A=1C/s\uff09
(\u90e8\u5206\u7535\u8def\u6b27\u59c6\u5b9a\u5f8b\uff09\u6216I=E(\u7535\u52a8\u52bf)/(R[\u5916]+r[\u5185]) \u6216I=E/(R+Rg[\u68c0\u6d4b\u5668\u7535\u963b]+r)(\u95ed\u5408\u7535\u8def\u6b27\u59c6\u5b9a\u5f8b\uff09
\u5728\u7535\u8def\u4e2d\u5982\u679c\u6b63\u8d1f\u79bb\u5b50\u540c\u65f6\u79fb\u52a8\u5f62\u6210\u7535\u6d41\uff0c\u90a3\u4e48Q\u4e3a\u4e24\u79cd\u7535\u8377\u7684\u7535\u91cf\u548c\u3002
\u6269\u5c55\u8d44\u6599\uff1a
\u4e32\u8054\u7535\u8def\uff08n\u4e2a\u7528\u7535\u5668\u4e32\u8054\uff09\uff1a
\u7535\u6d41\uff1aI\u603b=I1=I2....=In \uff08\u4e32\u8054\u7535\u8def\u4e2d\uff0c\u7535\u8def\u5404\u90e8\u5206\u7684\u7535\u6d41\u76f8\u7b49\uff09
\u7535\u538b\uff1aU\u603b=U1+U2....+Un (\u603b\u7535\u538b\u7b49\u4e8e\u5404\u90e8\u5206\u7535\u538b\u4e4b\u548c\uff09
\u7535\u963b\uff1aR\u603b=R1+R2....+Rn\uff08\u603b\u7535\u963b\u7b49\u4e8e\u5404\u90e8\u5206\u7535\u963b\u4e4b\u548c\uff09
\u5e76\u8054\u7535\u8def\uff08n\u4e2a\u7528\u7535\u5668\u5e76\u8054\uff09\uff1a
\u7535\u6d41\uff1aI\u603b=I1+I2....+In\uff08\u5e76\u8054\u7535\u8def\u4e2d\uff0c\u5e72\u8def\u7535\u6d41\u7b49\u4e8e\u5404\u652f\u8def\u7535\u6d41\u4e4b\u548c\uff09
\u7535\u538b\uff1aU\u603b=U1=U2....=Un\uff08\u5404\u652f\u8def\u4e24\u7aef\u7535\u538b\u76f8\u7b49\u5e76\u7b49\u4e8e\u7535\u6e90\u7535\u538b)
\u7535\u963b\uff1a1/R\u603b=1/R1+1/R2....+1/Rn\uff08\u603b\u7535\u963b\u5012\u6570\u7b49\u4e8e\u5404\u90e8\u5206\u7535\u963b\u5012\u6570\u4e4b\u548c\uff09\u3002\u5f532\u4e2a\u7528\u7535\u5668\u5e76\u8054\u65f6\uff0c\u6709\u4ee5\u4e0b\u63a8\u5bfc\u516c\u5f0f\uff1aR\u603b=R1R1/\uff08R1+R2\uff09
\u7535\u963b\u516c\u5f0f\u63a8\u5bfc\u65b9\u6cd5\uff1a
\uff081\uff09\u4e32\u8054\uff1a\u7531U\u603b=U1+U2....+Un\uff0c\u5f97\u5230I\u603bR\u603b=I1R1+I2R2....+InRn
\u56e0\u4e3a\u4e32\u8054\u7535\u8def\u5404\u90e8\u5206\u7535\u6d41\u76f8\u7b49\uff0c\u5373I\u603b=I1=I2....=In\uff0c\u6240\u4ee5\u5f97\u5230\uff1a
R\u603b=R1+R2....+Rn\uff08\u4f8b\u5982\u4e00\u4e2a3\u03a9\u7684\u7535\u963b\u548c\u4e00\u4e2a6\u03a9\u7684\u7535\u963b\u4e32\u8054\uff0c\u5176\u4e32\u8054\u7684\u603b\u7535\u963b\u4e3a9\u03a9\uff09
\uff082\uff09\u5e76\u8054\uff1a\u7531I\u603b=I1+I2....+In\uff0c\u5f97\u5230U\u603b/R\u603b=U1/R1+U2/R2....+Un/Rn
\u56e0\u4e3a\u5e76\u8054\u7535\u8def\u5404\u90e8\u5206\u7535\u538b\u7b49\u4e8e\u603b\u7535\u538b\uff0c\u5373U\u603b=U1=U2....=Un\uff0c\u6240\u4ee5\u5f97\u5230\uff1a
1/R\u603b=1/R1+1/R2....+1/Rn\uff08\u4f8b\u5982\u4e00\u4e2a3\u03a9\u7684\u7535\u963b\u548c\u4e00\u4e2a6\u03a9\u7684\u7535\u963b\u5e76\u8054\uff0c\u5176\u5e76\u8054\u7684\u603b\u7535\u963b\u4e3a2\u03a9\uff09
\u5bf9\u4e8e\u53ea\u6709\u4e24\u4e2a\u7535\u963b\u5e76\u8054\u7684\u90e8\u5206\u6765\u8bf4\uff0c\u53ef\u4ee5\u7ee7\u7eed\u63a8\u5bfc\u51fa\u4ee5\u4e0b\u516c\u5f0f\uff1a
\u75311/R\u603b=1/R1+1/R2....+1/Rn\u53ef\u77e5\uff1a1/R\u603b=1/R1+1/R2=R2/R1R2+R1/R1R2=\uff08R1+R2\uff09/R1R2
\u6240\u4ee5R\u603b=R1R1/\uff08R1+R2\uff09
\u7531\u4e0a\u9762\u7684\u516c\u5f0f\u8fd8\u53ef\u4ee5\u5f97\u5230\u4e00\u4e2a\u7ed3\u8bba\uff1a\u4e32\u8054\u7684\u603b\u7535\u963b\u5927\u4e8e\u5176\u4efb\u610f\u4e00\u5206\u7535\u963b\uff0c\u5e76\u8054\u7684\u603b\u7535\u963b\u5c0f\u4e8e\u5176\u4efb\u610f\u4e00\u5206\u7535\u963b\u3002
\u6700\u76f4\u89c2\u7684\u533a\u522b\u662f\u8fd9\u4e24\u79cd\u8fde\u63a5\u65b9\u5f0f\u7684\u7535\u6c60\u6240\u8868\u73b0\u7684\u4e0d\u540c\u7279\u70b9\uff0c\u56db\u8282\u7535\u6c60\u4e32\u8054\u8d77\u6765\u67096V\uff0c\u800c\u5e76\u8054\u5219\u4ecd\u7136\u53ea\u67091.5V\u3002
1.\u4e32\u8054\u7535\u8def\uff1a\u628a\u5143\u4ef6\u9010\u4e2a\u987a\u6b21\u8fde\u63a5\u8d77\u6765\u7ec4\u6210\u7684\u7535\u8def\u3002\u5982\u56fe\uff0c\u7279\u70b9\u662f\uff1a\u6d41\u8fc7\u4e00\u4e2a\u5143\u4ef6\u7684\u7535\u6d41\u540c\u65f6\u4e5f\u6d41\u8fc7\u53e6\u4e00\u4e2a\u3002\u4f8b\u5982\uff1a\u8282\u65e5\u91cc\u7684\u5c0f\u5f69\u706f\u3002 \u5728\u4e32\u8054\u7535\u8def\u4e2d\uff0c\u95ed\u5408\u5f00\u5173\uff0c\u4e24\u53ea\u706f\u6ce1\u540c\u65f6\u53d1\u5149\uff0c\u65ad\u5f00\u5f00\u5173\u4e24\u53ea\u706f\u6ce1\u90fd\u7184\u706d\uff0c\u8bf4\u660e\u4e32\u8054\u7535\u8def\u4e2d\u7684\u5f00\u5173\u53ef\u4ee5\u63a7\u5236\u6240\u6709\u7684\u7528\u7535\u5668\u3002
2.\u5e76\u8054\u7535\u8def\uff1a\u628a\u5143\u4ef6\u5e76\u5217\u5730\u8fde\u63a5\u8d77\u6765\u7ec4\u6210\u7684\u7535\u8def\uff0c\u5982\u56fe\uff0c\u7279\u70b9\u662f\uff1a\u5e72\u8def\u7684\u7535\u6d41\u5728\u5206\u652f\u5904\u5206\u4e24\u90e8\u5206\uff0c\u5206\u522b\u6d41\u8fc7\u4e24\u4e2a\u652f\u8def\u4e2d\u7684\u5404\u4e2a\u5143\u4ef6\u3002
\u4f8b\u5982\uff1a\u5bb6\u5ead\u4e2d\u5404\u79cd\u7528\u7535\u5668\u7684\u8fde\u63a5\u3002 \u5728\u5e76\u8054\u7535\u8def\u4e2d\uff0c\u5e72\u8def\u4e0a\u7684\u5f00\u5173\u95ed\u5408\uff0c\u5404\u652f\u8def\u4e0a\u7684\u5f00\u5173\u95ed\u5408\uff0c\u706f\u6ce1\u624d\u4f1a\u53d1\u5149\uff0c\u5e72\u8def\u4e0a\u7684\u5f00\u5173\u65ad\u5f00\uff0c\u5404\u652f\u8def\u4e0a\u7684\u5f00\u5173\u90fd\u95ed\u5408\uff0c\u706f\u6ce1\u4e0d\u4f1a\u53d1\u5149\uff0c\u8bf4\u660e\u5e72\u8def\u4e0a\u7684\u5f00\u5173\u53ef\u4ee5\u63a7\u5236\u6574\u4e2a\u7535\u8def\uff0c\u652f\u8def\u4e0a\u7684\u5f00\u5173\u53ea\u80fd\u63a7\u5236\u672c\u652f\u8def\u3002
3.\u4e32\u8054\u7535\u8def\u548c\u5e76\u8054\u7535\u8def\u7684\u7279\u70b9\uff1a \u5728\u4e32\u8054\u7535\u8def\u4e2d\uff0c\u7531\u4e8e\u7535\u6d41\u7684\u8def\u5f84\u53ea\u6709\u4e00\u6761\uff0c\u6240\u4ee5\uff0c\u4ece\u7535\u6e90\u6b63\u6781\u6d41\u51fa\u7684\u7535\u6d41\u5c06\u4f9d\u6b21\u9010\u4e2a\u6d41\u8fc7\u5404\u4e2a\u7528\u7535\u5668\uff0c\u6700\u540e\u56de\u5230\u7535\u6e90\u8d1f\u6781\u3002
\u56e0\u6b64\u5728\u4e32\u8054\u7535\u8def\u4e2d\uff0c\u5982\u679c\u6709\u4e00\u4e2a\u7528\u7535\u5668\u635f\u574f\u6216\u67d0\u4e00\u5904\u65ad\u5f00\uff0c\u6574\u4e2a\u7535\u8def\u5c06\u53d8\u6210\u65ad\u8def\uff0c\u7535\u8def\u5c31\u4f1a\u65e0\u7535\u6d41\uff0c\u6240\u6709\u7528\u7535\u5668\u90fd\u5c06\u505c\u6b62\u5de5\u4f5c\uff0c\u6240\u4ee5\u5728\u4e32\u8054\u7535\u8def\u4e2d\uff0c\u5404\u51e0\u4e2a\u7528\u7535\u5668\u4e92\u76f8\u7275\u8fde\uff0c\u8981\u4e48\u5168\u5de5\u4f5c\uff0c\u8981\u4e48\u5168\u90e8\u505c\u6b62\u5de5\u4f5c\u3002
\u5728\u5e76\u8054\u7535\u8def\u4e2d\uff0c\u4ece\u7535\u6e90\u6b63\u6781\u6d41\u51fa\u7684\u7535\u6d41\u5728\u5206\u652f\u5904\u8981\u5206\u4e3a\u4e24\u8def\uff0c\u6bcf\u4e00\u8def\u90fd\u6709\u7535\u6d41\u6d41\u8fc7\uff0c\u56e0\u6b64\u5373\u4f7f\u67d0\u4e00\u652f\u8def\u65ad\u5f00\uff0c\u4f46\u53e6\u4e00\u652f\u8def\u4ecd\u4f1a\u4e0e\u5e72\u8def\u6784\u6210\u901a\u8def\u3002\u7531\u6b64\u53ef\u89c1\uff0c\u5728\u5e76\u8054\u7535\u8def\u4e2d\uff0c\u5404\u4e2a\u652f\u8def\u4e4b\u95f4\u4e92\u4e0d\u7275\u8fde\u3002
\u4e32\u8054\u5206\u538b\uff0c\u5e76\u8054\u5206\u6d41\u3002
\u539f\u7406\uff1a\u5728\u4e32\u8054\u7535\u8def\u4e2d\uff0c\u5404\u7535\u963b\u4e0a\u7684\u7535\u6d41\u76f8\u7b49\uff0c\u5404\u7535\u963b\u4e24\u7aef\u7684\u7535\u538b\u4e4b\u548c\u7b49\u4e8e\u7535\u8def\u603b\u7535\u538b\u3002\u53ef\u77e5\u6bcf\u4e2a\u7535\u963b\u4e0a\u7684\u7535\u538b\u5c0f\u4e8e\u7535\u8def\u603b\u7535\u538b\uff0c\u6545\u4e32\u8054\u7535\u963b\u5206\u538b\u3002
\u5728\u5e76\u8054\u7535\u8def\u4e2d\uff0c\u5404\u7535\u963b\u4e24\u7aef\u7684\u7535\u538b\u76f8\u7b49\uff0c\u5404\u7535\u963b\u4e0a\u7684\u7535\u6d41\u4e4b\u548c\u7b49\u4e8e\u603b\u7535\u6d41\uff08\u5e72\u8def\u7535\u6d41\uff09\u3002\u53ef\u77e5\u6bcf\u4e2a\u7535\u963b\u4e0a\u7684\u7535\u6d41\u5c0f\u4e8e\u603b\u7535\u6d41\uff08\u5e72\u8def\u7535\u6d41\uff09\uff0c\u6545\u5e76\u8054\u7535\u963b\u5206\u6d41\u3002 \u7535\u963b\u7684\u4e32\u5e76\u8054\u5c31\u597d\u50cf\u6c34\u6d41\uff0c\u4e32\u8054\u53ea\u6709\u4e00\u6761\u9053\u8def\uff0c\u7535\u963b\u8d8a\u5927\uff0c\u6d41\u7684\u8d8a\u6162\uff0c\u5e76\u8054\u7684\u652f\u8def\u8d8a\u591a\uff0c\u7535\u6d41\u8d8a\u5927\u3002
\u9020\u6210\u89e6\u7535\u4f24\u4ea1\u7684\u4e3b\u8981\u56e0\u7d20\u4e00\u822c\u6709\u4ee5\u4e0b\u51e0\u65b9\u9762\uff1a
1\uff0e\u901a\u8fc7\u4eba\u4f53\u7535\u6d41\u7684\u5927\u5c0f\u3002\u6839\u636e\u7535\u51fb\u4e8b\u6545\u5206\u6790\u5f97\u51fa\uff1a\u5f53\u5de5\u9891\u7535\u6d41\u4e3a0\uff0e5\uff5e1mA\u65f6\uff0c\u4eba\u5c31\u6709\u624b\u6307\u3001\u624b\u8155\u9ebb\u6216\u75db\u7684\u611f\u89c9\uff1b\u5f53\u7535\u6d41\u589e\u81f38\uff5e10mA\u65f6\uff0c\u9488\u523a\u611f\u3001\u75bc\u75db\u611f\u589e\u5f3a\u53d1\u751f\u75c9\u631b\u800c\u6293\u7d27\u5e26\u7535\u4f53\uff0c\u4f46\u7ec8\u80fd\u6446\u8131\u5e26\u7535\u4f53\u3002
\u5f53\u63a5\u89e6\u7535\u6d41\u8fbe\u523020\uff5e30mA\u65f6\uff0c\u4f1a\u4f7f\u4eba\u8fc5\u901f\u9ebb\u75f9\u4e0d\u80fd\u6446\u8131\u5e26\u7535\u4f53\uff0c\u800c\u4e14\u8840\u538b\u5347\u9ad8\uff0c\u547c\u5438\u56f0\u96be\uff1b\u7535\u6d41\u4e3a50mA\u65f6\uff0c\u5c31\u4f1a\u4f7f\u4eba\u547c\u5438\u9ebb\u75f9\uff0c\u5fc3\u810f\u5f00\u59cb\u98a4\u52a8\uff0c\u6570\u79d2\u949f\u540e\u5c31\u53ef\u81f4\u547d\u3002\u901a\u8fc7\u4eba\u4f53\u7535\u6d41\u8d8a\u5927\uff0c\u4eba\u4f53\u751f\u7406\u53cd\u5e94\u8d8a\u5f3a\u70c8\uff0c\u75c5\u7406\u72b6\u6001\u8d8a\u4e25\u91cd\uff0c\u81f4\u547d\u7684\u65f6\u95f4\u5c31\u8d8a\u77ed\u3002
2\uff0e\u901a\u7535\u65f6\u95f4\u7684\u957f\u77ed\u3002\u7535\u6d41\u901a\u8fc7\u4eba\u4f53\u7684\u65f6\u95f4\u8d8a\u957f\u540e\u679c\u8d8a\u4e25\u91cd\u3002\u8fd9\u662f\u56e0\u4e3a\u65f6\u95f4\u8d8a\u957f\uff0c\u4eba\u4f53\u7684\u7535\u963b\u5c31\u4f1a\u964d\u4f4e\uff0c\u7535\u6d41\u5c31\u4f1a\u589e\u5927\u3002\u540c\u65f6\uff0c\u4eba\u7684\u5fc3\u810f\u6bcf\u6536\u7f29\u3001\u6269\u5f20\u4e00\u6b21\uff0c\u4e2d\u95f4\u67090\uff0e1s\u7684\u65f6\u95f4\u95f4\u9699\u671f\u3002\u5728\u8fd9\u4e2a\u95f4\u9699\u671f\u5185\uff0c\u4eba\u4f53\u5bf9\u7535\u6d41\u4f5c\u7528\u6700\u654f\u611f\u3002\u6240\u4ee5\uff0c\u89e6\u7535\u65f6\u95f4\u8d8a\u957f\uff0c\u4e0e\u8fd9\u4e2a\u95f4\u9699\u671f\u91cd\u5408\u7684\u6b21\u6570\u5c31\u8d8a\u591a\uff0c\u4ece\u800c\u9020\u6210\u7684\u5371\u9669\u4e5f\u5c31\u8d8a\u5927\u3002
3\uff0e\u7535\u6d41\u901a\u8fc7\u4eba\u4f53\u7684\u9014\u5f84\u3002\u5f53\u7535\u6d41\u901a\u8fc7\u4eba\u4f53\u7684\u5185\u90e8\u91cd\u8981\u5668\u5b98\u65f6\uff0c\u540e\u679c\u5c31\u4e25\u91cd\u3002\u4f8b\u5982\u901a\u8fc7\u5934\u90e8\uff0c\u4f1a\u7834\u574f\u8111\u795e\u7ecf\uff0c\u4f7f\u4eba\u6b7b\u4ea1\u3002\u901a\u8fc7\u810a\u9ad3\uff0c\u4f1a\u7834\u574f\u4e2d\u67a2\u795e\u7ecf\uff0c\u4f7f\u4eba\u762b\u75ea\u3002
\u901a\u8fc7\u80ba\u90e8\u4f1a\u4f7f\u4eba\u547c\u5438\u56f0\u96be\u3002\u901a\u8fc7\u5fc3\u810f\uff0c\u4f1a\u5f15\u8d77\u5fc3\u810f\u98a4\u52a8\u6216\u505c\u6b62\u8df3\u52a8\u800c\u6b7b\u4ea1\u3002\u8fd9\u51e0\u79cd\u4f24\u5bb3\u4e2d\uff0c\u4ee5\u5fc3\u810f\u4f24\u5bb3\u6700\u4e3a\u4e25\u91cd\u3002\u6839\u636e\u4e8b\u6545\u7edf\u8ba1\u5f97\u51fa\uff1a\u901a\u8fc7\u4eba\u4f53\u9014\u5f84\u6700\u5371\u9669\u7684\u662f\u4ece\u624b\u5230\u811a\uff0c\u5176\u6b21\u662f\u4ece\u624b\u5230\u624b\uff0c\u5371\u9669\u6700\u5c0f\u7684\u662f\u4ece\u811a\u5230\u811a\uff0c\u4f46\u53ef\u80fd\u5bfc\u81f4\u4e8c\u6b21\u4e8b\u6545\u7684\u53d1\u751f\u3002
4\uff0e\u7535\u6d41\u7684\u79cd\u7c7b\u3002\u7535\u6d41\u53ef\u5206\u4e3a\u76f4\u6d41\u7535\u3001\u4ea4\u6d41\u7535\u3002\u4ea4\u6d41\u7535\u53ef\u5206\u4e3a\u5de5\u9891\u7535\u548c\u9ad8\u9891\u7535\u3002\u8fd9\u4e9b\u7535\u6d41\u5bf9\u4eba\u4f53\u90fd\u6709\u4f24\u5bb3\uff0c\u4f46\u4f24\u5bb3\u7a0b\u5ea6\u4e0d\u540c\u3002\u4eba\u4f53\u5fcd\u53d7\u76f4\u6d41\u7535\u3001\u9ad8\u9891\u7535\u7684\u80fd\u529b\u6bd4\u5de5\u9891\u7535\u5f3a\u3002\u6240\u4ee5\uff0c\u5de5\u9891\u7535\u5bf9\u4eba\u4f53\u7684\u5371\u5bb3\u6700\u5927\u3002
5\uff0e\u89e6\u7535\u8005\u7684\u5065\u5eb7\u72b6\u51b5\u3002\u7535\u51fb\u7684\u540e\u679c\u4e0e\u89e6\u7535\u8005\u7684\u5065\u5eb7\u72b6\u51b5\u6709\u5173\u3002\u6839\u636e\u8d44\u6599\u7edf\u8ba1\uff0c\u808c\u8089\u53d1\u8fbe\u8005\u3001\u6210\u5e74\u4eba\u6bd4\u513f\u7ae5\u6446\u8131\u7535\u6d41\u7684\u80fd\u529b\u5f3a\uff0c\u7537\u6027\u6bd4\u5973\u6027\u6446\u8131\u7535\u6d41\u7684\u80fd\u529b\u5f3a\u3002\u7535\u51fb\u5bf9\u60a3\u6709\u5fc3\u810f\u75c5\u3001\u80ba\u75c5\u3001\u5185\u5206\u6ccc\u5931\u8c03\u53ca\u7cbe\u795e\u75c5\u7b49\u60a3\u8005\u6700\u5371\u9669\u3002\u4ed6\u4eec\u7684\u89e6\u7535\u6b7b\u4ea1\u7387\u6700\u9ad8\u3002\u53e6\u5916\uff0c\u5bf9\u89e6\u7535\u6709\u5fc3\u7406\u51c6\u5907\u7684\uff0c\u89e6\u7535\u4f24\u5bb3\u8f7b\u3002
\u53c2\u8003\u8d44\u6599\uff1a\u767e\u5ea6\u767e\u79d1\u2014\u2014\u7535\u6d41
I总=I1+I2+I3+……+In。 I总=U÷R总。
并联电路中总电流可以有两种计算方法：
一、首先分别根据 I1=U/R1、I2=U/R2、I3=U/R3，……，In=U/Rn 计算各支路电流，然后再把各支路电流相加得到 I总=I1+I2+I3+……+In。
二、首先根据计算并联电路总电阻R总，再根据总电压U除以总电阻R总，求得总电流。
在并联电路中，各电阻两端的电压相等，各电阻上的电流之和等于总电流（干路电流）。可知每个电阻上的电流小于总电流（干路电流），故并联电阻分流。 电阻的串并联就好像水流，串联只有一条道路，电阻越大，流的越慢，并联的支路越多，电流越大。
扩展资料：
并联是将二个或二个以上二端电路元件中每个元件的二个端子，分别接到一对公共节点上的连接方式，n个二端元件的并联。它们都接到一对公共节点之上，这对节点再分别与电路的其他部分连接。
并联电路的特点主要有：
（1）所有并联元件的端电压是同一个电压，即图示电路中的V。
（2）并联电路的总电流是所有元件的电流之和。图示电路中，i是总电流，i1、i2、i3分别是元件1、2、3的电流，i=i1+i2+i3。
实例：民用照明灯泡都是并联接到220V额定电压的电源上，因此每只灯泡所承受的电压均为220V，而外电路的总电流则是流过所有灯泡的电流之和。
参考资料：百度百科——并联电路
并联电路总电流等于各个支路电流之和
并联电路中的总电流等于各分电流之和
总电流等于各支路电流之和
探究：并联电路中的电流关系
绛旓細I鎬=I1+I2+I3+鈥︹+In銆 I鎬=U梅R鎬銆傚苟鑱旂數璺腑鎬荤數娴佸彲浠ユ湁涓ょ璁＄畻鏂规硶锛氫竴銆侀鍏堝垎鍒牴鎹 I1=U/R1銆両2=U/R2銆両3=U/R3锛屸︹︼紝In=U/Rn 璁＄畻鍚勬敮璺數娴侊紝鐒跺悗鍐嶆妸鍚勬敮璺數娴佺浉鍔犲緱鍒 I鎬=I1+I2+I3+鈥︹+In銆備簩銆侀鍏堟牴鎹绠楀苟鑱旂數璺荤數闃籖鎬伙紝鍐嶆牴鎹荤數鍘婾闄や互鎬荤數闃籖鎬伙紝...
绛旓細1銆佹荤數娴佺殑璁＄畻锛欼鎬伙紳I1+I2+...+In銆鍗虫荤數娴佺瓑浜庨氳繃鍚勪釜鐢甸樆鐨勭數娴佷箣鍜銆2銆佹荤數鍘嬬殑璁＄畻锛歎鎬伙紳U1=U2=鈥︹︼紳Un銆傚苟鑱旂數璺悇鏀矾涓ょ鐨勭數鍘嬬浉绛夛紝涓旂瓑浜庢荤數鍘嬨
绛旓細鍗虫荤數娴佺瓑浜庨氳繃鍚勪釜鐢甸樆鐨勭數娴佷箣鍜銆2.鐢靛帇璁＄畻 U鎬=U1=U2=鈥︹=Un 骞惰仈鐢佃矾鍚勬敮璺袱绔殑鐢靛帇鐩哥瓑锛屼笖绛変簬鎬荤數鍘嬨
绛旓細U=I1R1=I2R2=I3R3銆傚苟鑱旂數璺腑鍚勬敮璺數鍘嬬浉绛夛紝鍦ㄦ瘡涓敮璺袱绔兘鏈夌浉绛夌殑鐢靛帇锛岀敱浜庣數鍘嬫槸浜х敓鐢垫祦鐨勫師鍥狅紝鍦ㄧ數闃诲悎閫傜殑鎯呭喌涓嬶紝鍚勬敮璺竴瀹氫細鏈変竴瀹氱數娴侀氳繃锛堜笉鍖呮嫭鐭矾锛夛紝鑷充簬鍒嗘祦鐨勫灏戯紝鐢卞垎娴佸叕寮忓喅瀹氥傚悓鍨嬪彿鐨勭數鍔涚數瀛愬櫒浠朵覆鑱旀椂锛屾诲笇鏈涘悇鍏冧欢鑳芥壙鍙楀悓鏍风殑姝ｃ佸弽鍚戠數鍘嬶紱骞惰仈鏃讹紝鍒欏笇鏈涘悇鍏冧欢...
绛旓細1銆侀涓绠楁柟娉曟槸閿欒鐨勩骞惰仈鐢佃矾涓荤數娴佺瓑浜庣數婧愮數鍘嬮櫎浠ュ苟鑱斿悗鐨勭數闃诲硷紝鍙堢瓑浜庡悇鏀矾鐨勭數娴佷箣鍜銆傞涓紝S1銆丼2鍧囬棴鍚堟椂锛孯1R2骞惰仈锛屽苟鑱斿悗鐨勭數闃诲糝骞=R1*R2/锛圧1+R2锛=77.33惟锛屾荤數娴両=U/R骞=220/77.33=3A 鍙堬細鍦≧1鏀矾涓紝I1=U/R1=220/110=2A锛涘湪S2\R2鏀矾涓紝I2=U/R2=...
绛旓細骞惰仈鐢佃矾涓鐨鎬荤數娴佺瓑浜鍚勫垎鏀數璺腑鐢甸樆涓婄殑鐢垫祦涔嬪拰銆侷=I1+I2銆傚苟鑱旀槸鍏冧欢涔嬮棿鐨勪竴绉嶈繛鎺ユ柟寮忥紝鍏剁壒鐐规槸灏2涓悓绫绘垨涓嶅悓绫荤殑鍏冧欢銆佸櫒浠剁瓑棣栭鐩告帴锛屽悓鏃跺熬灏句害鐩歌繛鐨勪竴绉嶈繛鎺ユ柟寮忋傞氬父鏄敤鏉ユ寚鐢佃矾涓數瀛愬厓浠剁殑杩炴帴鏂瑰紡锛屽嵆骞惰仈鐢佃矾銆
绛旓細涓茶仈鐢佃矾锛 I鎬=I1=I2(涓茶仈鐢佃矾涓紝鍚勫鐢垫祦鐩哥瓑) U鎬=U1+U2锛堜覆鑱旂數璺腑锛屾荤數鍘嬬瓑浜庡悇閮ㄥ垎涓ょ鐢靛帇鐨勬诲拰锛 瀵瑰簲鐨凴鏍规嵁娆у瀹氬緥琛嶇敓鍏紡R=U/I璁＄畻 骞惰仈鐢佃矾锛 I鎬=I1+I2锛骞惰仈鐢佃矾涓锛屽共璺鐢垫祦绛変簬鍚勬敮璺數娴佺殑鍜岋級 U鎬=U1=U2 锛堝苟鑱旂數璺腑锛岀數婧愮數鍘嬩笌鍚勬敮璺袱绔數鍘嬬浉绛夛級 R=R1R2/...
绛旓細1銆骞惰仈鐢佃矾涓鍚勬敮璺殑鐢靛帇閮界浉绛夛紝骞朵笖绛変簬鐢垫簮鐢靛帇锛歎=U1=U2銆2銆佸苟鑱旂數璺腑鐨勫共璺數娴侊紙鎴栬鎬荤數娴锛夌瓑浜庡悇鏀矾鐢垫祦涔嬪拰锛欼=I1+I2銆3銆佸苟鑱旂數璺腑鐨勬荤數闃荤殑鍊掓暟绛変簬鍚勬敮璺數闃荤殑鍊掓暟鍜岋細1/R=1/R1+1/R2鎴栧啓涓猴細R=R1*R2/(R1+R2)锛屽嵆锛1/R=1/R1+1/R2+1/R3+鈥+1/Rn銆4銆佸苟鑱...
绛旓細1銆佹荤數闃诲肩殑璁＄畻锛1/R鎬=1/R1+1/R2+1/Rn锛屽嵆鎬荤數闃荤殑鍊掓暟绛変簬鍚勫垎鐢甸樆鐨勫掓暟涔嬪拰銆傜壒鍒殑锛屼袱鐢甸樆骞惰仈鎬诲间负锛歊鎬=锛圧1*R2)/锛圧1+R2锛夊浜巒涓浉绛夌殑鐢甸樆骞惰仈锛屽叕寮忓氨绠鍖栦负R骞=R/n銆2銆佸埄鐢ㄥ叕寮廟鎬=锛圧1*R2)/锛圧1+R2锛夋寜鐓х數闃诲苟鑱斿叕寮1/R鎬=1/R1+1/R2+1/Rn锛屽皢姣忎釜鍒嗙數闃荤殑...
绛旓細鎴戜滑鎶婁笂闈袱涓紡瀛愯仈绔嬶紝灏辫兘澶熷緱鍒1/R鎬=1/R1+1/R2+1/R3 閭ｄ箞R鎬=1/(1/R1+1/R2+1/R3)鈻茬數娴佺數鍘嬬數闃荤壒鐐 鍦骞惰仈鐢佃矾涓荤數娴佺瓑浜鍚勬敮璺數娴佷箣鍜屻傚湪骞惰仈鐢佃矾涓數鍘嬮兘鐩哥瓑銆傚湪骞惰仈鐢佃矾涓荤數闃荤殑鍊掓暟绛変簬鍚勬敮璺數闃荤殑鍊掓暟涔嬪拰銆傚湪骞惰仈鐢佃矾涓數娴佺殑鍒嗛厤璺熺數闃绘垚鍙嶆瘮銆傗柌涓茶仈涓庡苟鑱旂殑鍖哄埆 棣...
