两个电阻R1=12Ω,R2=6Ω,它们并联的总电阻是_Ω.
问题描述:
两个电阻R1=12Ω,R2=6Ω,它们并联的总电阻是______Ω.
答
根据并联电阻的特点可得:
=1 R
+1 R1
1 R2
R=
=
R1R2
R1+R2
=4Ω.12Ω×6Ω 12Ω+6Ω
故答案为:4.