试题与答案

3A的直流电通过电阻R时，t时间内产生的热量为Q；现让一交流电通过电阻R，若2t

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题型：选择题

题目：

3A的直流电通过电阻R时，t时间内产生的热量为Q；现让一交流电通过电阻R，若2t时间内产生的热量为Q，则该交流电流的有效值和最大值分别为（　　）

A．I有=3/2A，Im=3A

B．I有=3A，I有=3A

C．I有= A，I有 A

D．I有3A，Im=6A

答案：

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下面是错误答案，用来干扰机器的。

参考答案：A

考点：交变电流的周期和频率
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