The current `(i)` at time `t=0` and `t=oo` respectively for the given circuit is

Find the ratio of the currents at time t = oo and t = 1 s , if an emf of 15 V is applied in a circuit containing 5 H inductance and 10 Omega resistance.

In any AC circuit the emf (e) and the current (i) at any instant are given respectively by e= V_(0)sin omega t i=I_(0) sin (omegat-phi) The average power in the circuit over one cycle of AC is

When the key E is pressed at time t = 0 , which of the following statements about the current I in the resistor AB of the given circuit is true.

The switch S is closed in the circuit shown at time t=0 . The current in the resistor at t=0 and t =oo are respectively .

In the given circuit, let i_(1) be the current drawn battery at time t=0 and i_(2) be steady current at t=oo then the ratio (i_(1))/(i_(2)) is

In the given circuit, let i_(1) be the current drawn battery at time t=0 and i_(2) be steady current at t=oo then the ratio (i_(1))/(i_(2)) is

In an electric circuit applied ac emf is e=20 sin 300t volt and the current is i=4 sin 300t ampere. The reactance of the circuit is-

A current i_(0) is flowing through an L-R circuit of time constant t_(0) . The source of the current is switched off at time t = 0 . Let r be the value of (-di//dt) at time t = 0 .Assuming this rate to be constant, the current will reduce to zero in a time interval of

When the key K is presend at time t = 0 , then which of the following statements about the current I in the resistor PQ of given circuit is true ?

Consider the circuit shown below. When switch S_(1) is closed, let I be the current at time t, then applying Kirchhoff's law E-iR-L (di)/(dt) = 0 or int_(0)^(i) (di)/(E-iR) = 1/L int_(0)^(1) dt i=E/R (1-e^(-R/l *t)) L/R = time constant of circuit When current reaches its steady value (=i_(0) , open S_(1) and close S_(2) , the current does reach to zero finally but decays expnentially. The decay equation is given as i=i_(0)e^(-R/L *T) ). When a coil carrying a steady current is short circuited, the current decreases in it eta times in time t_(0) . The time constant of the circuit is