Question

Define mutual inductance. Write its SI unit.

Hint:

Mutual inductance quantifies the ability of one coil to induce emf in another due to changing magnetic flux.

Answer 1

Definition of Mutual Inductance
- Mutual inductance (\( M \)) is the property of two coils in which a change in current in one coil induces an electromotive force (emf) in the other due to electromagnetic induction.
- The induced emf in the secondary coil is given by: \[ \mathcal{E}_2 = - M \frac{dI_1}{dt} \] where \( I_1 \) is the current in the primary coil. - The SI unit of mutual inductance is Henry (H), where 1 Henry = 1 Weber per Ampere (1 H = 1 Wb/A).