The ratio of mean value over half cycle to r.m.s. value of \( \mathrm{AC} \) is: \( \mathrm{P} \...

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The ratio of mean value over half cycle to r.m.s. value of \( \mathrm{AC} \) is:
\( \mathrm{P} \)
(1) \( \sqrt{2}: 1 \)
W
(2) \( 2: \pi \)
(3) \( 2 \sqrt{2}: \pi \)
(4) \( \sqrt{2}: \pi \)
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