If an \( \mathrm{AC} \) main supply is given to be \( 220 \mathrm{~...

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If an \( \mathrm{AC} \) main supply is given to be \( 220 \mathrm{~V} \). What would be the average emf during a positive half-cycle?
(a) \( 198 \mathrm{~V} \)
(b) \( 386 \mathrm{~V} \)
(c) \( 256 \mathrm{~V} \)
(d) None of these
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