An ac voltage is represented by \( E=220 \sqrt{2} \cos \) P \( (50 \pi) t \). How many times wil...

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An ac voltage is represented by \( E=220 \sqrt{2} \cos \)
P \( (50 \pi) t \). How many times will be current become

W zero in \( 1 \mathrm{~s} \) ?
(1) 50 times
(2) 100 times
(4) 25 times
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