挑战习题
1/5单选题
难度:

1.

如图所示的电路,电阻R1的阻值是4 Ω ,电压表V1与V2的示数相等,R2R3的功率之和是R1消耗功率的5倍,则电阻R3的阻值是( )


A

12 Ω 

B

8 Ω 

C

4 Ω 

D

1 Ω 

提示1:
PHA+55S15Y6L6KGoVjxzdWI+MTwvc3ViPuS4jlY8c3ViPjI8L3N1Yj7nmoTnpLrmlbDnm7jnrYks5YiZ5pyJUjxzdWI+MTwvc3ViPitSPHN1Yj4yPC9zdWI+PVI8c3ViPjM8L3N1Yj7vvIw8L3A+
提示2:
PHA+5Liy6IGU55S16Lev55S15rWB5aSE5aSE55u4562JPC9wPg==
提示3:
PHA+5Liy6IGU55S16Lev5Yqf546H5LiO55S16Zi75oiQ5q2j5q+UPC9wPg==
正确答案:QQ==
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