Comprehension An inductor having self inductance \( L \) with its coil resistance \( R \) is con...

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Comprehension
An inductor having self inductance
\( L \) with its coil resistance \( R \) is connected across a battery of emf \( \varepsilon \). When the circuit is in steady state at \( t=0 \) an iron rod is inserted into the inductor due to which its inductance becomes \( n L(n1) \).
When again circuit is in steady state, the current in it is
(a) \( I\varepsilon / \mathrm{R} \)
(b) \( I\varepsilon / R \)
(c) \( I=\varepsilon / \mathrm{R} \)
(d) None of these
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