公式1/R=1/R1+1/R2(R≠R1),则R2=_.
问题描述:
公式
=1 R
+1 R1
(R≠R1),则R2=______. 1 R2
答
=1 R
+1 R1
,1 R2
等式两边同时乘以RR1R2,可得:R1R2=RR2+RR1,
整理得:(R1-R)R2=RR1,
解得:R2=
.RR1
R1−R
故答案为:
.RR1
R1−R