In an LR circuit, current at t=0 is 2A . After 2s it reduced to 18A. The time constant of the circuit is (in second)

In an LR circuit, current at t=0 is 20A . After 2s it reduced to 18A. The time constant of the circuit is (in second)

In an LR circuit, current at t = 0 is 20 A . After 2 s it reduces to 18 A . The time constant of the circuit is :

Time constant of LR circuit will be

Time constant of LR circuit will be

A coil carrying a steady current is short-circuited. The current in it decreases alpha times in time t_(0) . The time constant of the circuit is

A coil carrying a steady current is short-circuited. The current in it decreases alpha times in time t_(0) . The time constant of the circuit is

The current in a LR circuit builds up to 3/4 th of its steady state value in 4s. The time constant of this circuit is

In an LR-circuit the current attains one-third of its final steady value in 5s. What is the time-constant of the circuit ? (log_(2) = 0.405)

The current in a LR circuit builds up to (3)/(4)th of its steady state value in 4s . The time constant of this circuit is