Question

what is electromagnetic induction

Answer 1

When an induced current is produced because of voltage production (electromotive force) due to a changing magnetic field, it is called Electromagnetic Induction. This either happens when a conductor is placed in a moving magnetic field (when using ac power source) or when a conductor is constantly moving in a stationary magnetic field.

Answer 2

it is the production of electromotive force across an electric Conductor in a changing magnetic field