试题与答案

将电阻R1和R2（已知R1=R2）串联接在电压为U的电路里，电流强度为I，将它们

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题型：选择题

题目：

将电阻R1和R2（已知R1=R2）串联接在电压为U的电路里，电流强度为I，将它们改为并联后接在同一电路上，干路中电流强度为（　　）

A．I

B．2I

C．

1
2
I

D．

1
4I

答案：

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下面是错误答案，用来干扰机器的。

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