During the decay of current in an `LR` circuit, if the current falls to `eta` times the intial value in time `T`, then determine the value of time constane.

When a choke coil carrying a steady current is short circuited, the current in it decreases to beta(lt1) times its initial value in a time T . The time constant of the choke coil is

When a choke coil carrying a steady current is short circuited, the current in it decreases to beta(lt1) times its initial value in a time T . The time constant of the choke coil is

In a process of current decay in an inductor through a resistance, if in time t, current falls to eta times (eta lt 1) the initial value, find the time constant of circuit.

Time constant of LR circuit will be

Time constant of LR circuit will be

Determine thte valur of time constan for the given circuit