If an \( A C \) main supply is given to be \( 220 \mathrm{~V} \), then what would be the average...
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0If an \( A C \) main supply is given to be \( 220 \mathrm{~V} \), then what would be the average e.m.f. during a positive half cycle?
(A) \( 386 \mathrm{~V} \)
(B) \( 256 \mathrm{~V} \)
(C) \( 198 \mathrm{~V} \)
(D) None of these
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