Question

Why an emf is induced when there is change in magnetic flux. (class 10)
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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.

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Answer 2

Answer:

Whenever the flux passing through the coil changes by any way (like either changing angle, magnetic field or area of coil), we are actually producing a relative motion between electrons and magnetic field. As a result, the electrons experience a magnetic force and shift to produce EMF.

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