A closed circuit consists of a source of constant emf \( E \) and a choke coil of inductance \( ....

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A closed circuit consists of a source of constant emf \( E \) and a choke coil of inductance \( L \) connected in series.
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The active resistance of the whole circuit is equal to \( R \).
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It is in steady state. At the moment \( t=0 \) the choke coil inductance was decreased abruptly 4 times. The current in the circuit as a function of time \( t \) is \( \mathrm{E} / \mathrm{R} \) \( \left[1+x e^{-4 t R / L}\right] \). Find out value of \( \mathrm{x} \).


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