### Q.Mutually inductance between two magnetically-coupled coils depends upon

• APermeability of the core
• BThe number of their turns
• CCross-sectional area of their common core
• DAll of the above
Correct Answer : (D)

All of the above

Hints :

Mutually inductance between two magnetically-coupled coils depends upon Permeability of the core, The number of their turns and Cross-sectional area of their common core.

The property of coil by which a counter EMF is induced in it. when the current through the coil changes is known as

As per faraday’s law of electromagnetic induction, an EMF is induced in a conductor whenever it