Show that the time for attaining half the value of the final steady current in LR-series circuit is `0.693(L//R)`.

In L-C-R series circuit

The current in the series L-C-R circuit is

At resonance the peak value of current in L-C-R series circuit is

Find the steady-state value of current in the circuits.

What is the value of power factor for series LR circuit ?

Does the steady state current in RL circuit depend upon L ?

L.R. Circuit

The given graph shows variation with time in the source voltage and steady state current drawn by a series RLC circuit. Given curve through origin is the current variation. Which of the following statements "is"//"are" correct ?

A coil of inductance 2 H and resistance 10 Omega are in a series circuit with an open key and a cell of constant 100 V with negligible resistance. At time i = 0 , the key is closed. Find (a) the time constant of the circuit. (b) the maximum steady current in the circuit. (c) the current in the circuit at f =1 s .

Show that the sum of instantaneous currents during growth and decay of current in LR circuit is independent of time.