ElectroMagnetic InductionHard

Question

A closed circuit consists of a source of constant emf E and a choke coil of inductance L connected in series. The active resistance of the whole circuit is equal to R. It is in steady state. At the moment t = 0 the choke coil inductance was decreased abruptly h times. Find the current in the circuit as a function of time t.

Options

A.
B.
C.
D.

Solution

U = Li2
P = I2R
or           = τ.

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