單項(xiàng)選擇題已知某激勵(lì)信號(hào)u(t)=1.732sin(314t+30°)V,由此可知該信號(hào)的有效值、頻率及初相角分別為()。

A.1V,314rad/s,30°
B.1.732V,0.02s,30°
C.1.225V,50Hz,30°
D.1.732V,314rad/s,30°


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