Electromagnetic...

Given figure is the symbol for which component in the electrical circuit?

An e.m.f. of 5 millivolt is induced in a coil when in a nearby placed another coil, the current changes by 5 ampere in 0.1 second. The coefficient of mutual induction between the two coils will be :

When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage

What is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current?

Reactance of a coil is $$157\Omega$$. On connecting the coil across a source of frequency $$ 100Hz$$, the current lags behind e.m.f. by $${ 45 }^{ o }$$. The inductance of the coil is _________.

Two coils A and B have 200 and 400 turns respectively. A current of 1 A in coil A causes a flux per turn of $$10^{-3}$$ Wb to link with A and a flux per turn of $$0.8 \times 10^{-3}$$ Wb through B. The ratio of self-inductance of A and the mutual inductance of A and B is :

Electromagnetic induction is not used in :

If an emf of $$25 V$$ is induced when the current in the coil changes at the rate of $$100\ As^{-1}$$, then the coefficient of self induction of the coil is

Electromagnetic induction is not used in :

Electromagnetic induction is not used in