If the current \( 30 \mathrm{~A} \) flowing in the primary coil is ...

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If the current \( 30 \mathrm{~A} \) flowing in the primary coil is made zero in \( 0.1 \mathrm{sec} \). The emf induced in the
\( \mathrm{P} \) secondary coil is 1.5 volt. The mutual inductance

W between the coil is
(1) \( 0.005 \mathrm{H} \)
(2) \( 1.05 \mathrm{H} \)
(3) \( 0.1 H \)
(4) \( 0.2 \mathrm{H} \)
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