Two circuits have coefficient of mutual induction of \( \mathrm{P} ...

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Two circuits have coefficient of mutual induction of
\( \mathrm{P} \) 0.09 henry. Average e.m.f. induced in the secondary

W by a change of current from 0 to 20 ampere in 0.006 second in the primary will be
(1) \( 120 \mathrm{~V} \)
(2) \( 80 \mathrm{~V} \)
(3) \( 200 \mathrm{~V} \)
(4) \( 300 \mathrm{~V} \)
\( \theta \)
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