题目内容
(请给出正确答案)
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某一正弦交流电压的周期为0.01s,则其频率为()。
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A、I(t)=10sin(0.01t+)A
B、I(t)=10sin(628t+90°)A
C、I(t)=10sin(200πt+60°)A
D、I(t)=10sin(628t+)A