并联电路电流怎么算？

Question

如题所述

Answer 1

设R1、R2并联，流过的电流分别为I1、I2，总电流为I。
并联电阻为R并=(R1R2)/(R1+R2)
I1R1=I2R2=IR并

I1=IR并/R1
=I[(R1R2)/(R1+R2)]/R1
=IR2/(R1+R2)
I2=IR并/R2
=I[(R1R2)/(R1+R2)]/R2
=IR1/(R1+R2)