已知正弦电流的初相为60°,t=0时的瞬时值为8.66A,经过1/300s后电流第一次下降为0，则其振幅Im为（）A。A.314 B.50 C.10 ...

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问题已知正弦电流的初相为60°,t=0时的瞬时值为8.66A,经过1/300s后电流第一次下降为0，则其振幅Im为（）A。

选项 A.314 B.50 C.10 D.100

答案 C

解析正确答案是C。

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