Question

What principle of electromagnetic damping?

Answer 1

$\bold{ANSWER}$

When a conductor rotates in a magnetic field, then the magnetic flux linked with it changes which induces e.m.f. If the, circuit is complete then the induced e.m.f. will proguce induced current. According to Lenz's law the direction of induced current will be so-as to oppose the cause of its production, which is rotation of conductor, hence the conductor stops. This is called electromagnetic damping

$\bold{THANKS}$

Answer 2

The electromagnetic damping force is proportional to the induced eddy current, strength of magnetic field and the speed of the object.

The damping effect of Eddy Currents is used in some moving coil galvanometers to make them dead-beat.