Question

an emf induced in a coil 'the magnetic flux?​

Answer 1

Answer:

Any change in the magnetic environment of a coil of wire will cause a voltage (emf) to be "induced" in the coil. ... The induced emf in a coil is equal to the negative of the rate of change of magnetic flux times the number of turns in the coil. It involves the interaction of charge with magnetic field.

Answer 2

Faraday's Principle of Electromagnetic Induction states that the emf induced in a loop due by a changing magnetic flux is equal to the rate of change of the magnetic flux threading the loop. The magnetic flux threading a coil of wire can be changed by moving a bar magnet in and out of the coil.