Electromagnetic...

An e.m.f. of 5 volt is produced by a self-inductance, when the current changes at a steady rate from 3 A to 2 A in 1 millisecond. The value of self-inductance is

The current passing through a choke coil of 5 henry is decreasing at the rate of 2 ampere/sec. The e.m.f.developing across the coil is

Average energy stored in a pure inductance L when acurrent i flows through it, is

A solenoid has 2000 turns wound over a length of 0.30 metre. The area of its cross-section is 1.2 × 10^–3 m². Around its central section, a coil of 300 turns is wound. If an initial current of 2 A in the solenoid is reversed in 0.25 sec, then the e.m.f. induced in the coil is

The momentum in mechanics is expressed as m × v. The analogous expression in electricity is

In what form is the energy stored in an inductor
or
A coil of inductance L is carrying a steady current i. What is the nature of its stored energy.

The time constant of an LR circuit represents the time inwhich the current in the circuit

The mutual inductance between two coils is 1.25 henry. If the current in the primary changes at the rate of 80 ampere/second, then the induced e.m.f. in the secondary is

When the number of turns in a coil is doubled without any change in the length of the coil, its self-inductancebecomes

The average e.m.f. induced in a coil in which the current changes from 2 ampere to 4 ampere in 0.05 second is 8 volt. What is the self-inductance of the coil