The emf E of a source varies with time. It sends a current I through a coil of self-inductance L connected to it. What is the instantaneous effective emf of the circuit?

If current I passes through a pure inductor of self-inductance L, the energy stored is

Find out the energy stored in a coil of self inductance L due to a current I through it.

The current through a coil of self inductance L = 2mH is given by I=t^(2)e^(-t) at time t. How long it will take to make the e.m.f zero?

At any instant current i through a coil of self inductance 2 mH is given by i=t^(2)e^(-t) . The induced e.m.f. will be zero at time

The current through a coil of self-inductance 500 mH is 4 A. What amount of magnetic energy (in J) is stored in its magnetic field?

The rate change of flux change inside on core of self inductance 0.5 H, is 20A//S . What is the amount,of induced emf in the circuit?

The inductor coils of inductance L are connected in parallel combination. What will be the-resultant inductance?

What will be the reactance if a current of frequency f flows through an inductor of self-inductance L?

An alternating emf of E=20sin 1000tV is applied on a circuit containing a pure resistance of 25Omega in series with a coil of self-inductance 40 mH and resistance 15Omega . Find out the power factor of the circuit , Also , find out this capacitance of a capacitor that should be connected in series to raise the power factory to unity.

An electric cell is sending electric currents through a resistance of 10 Omega . IF a shunt of 1 Omega is connected with that resistance then the current through the 10 Omega resistance becomes half of the previous value.What is the resistance of the cell?IF the current through the shunt be 0.9A, then what will be the emf of the cell?