Question

What is eddy current?

Answer 1

Eddy currents are defined as currents induced in a thick conductor when the conductor is placed in a changing magnetic field.It is the tendency of a changing magnetic field to induce a current that opposes the change.

When a solid conductor is kept close to a changing magnetic field, little current loops form within the conductor,(electrons traversing in small circles ) that, in turn, generates a magnetic field which opposes the change. This is how eddy currents are formed.