An inductance \( L \) and a resistance \( R \) are first connected ...

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An inductance \( L \) and a resistance \( R \) are first connected to a battery. After some time the battery
\( \mathrm{P} \) is disconnected but \( L \) and \( R \) remain connected in a closed circuit. Then the current reduces to \( 37 \% \) of
W. its initial value in
(1) RL sec
(2) \( \frac{R}{L} \sec \)
(3) \( \frac{L}{R} \sec \)
(4) \( \frac{1}{L R} \sec \)
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