Home › MHT-CET › Physics › Electromagnetic Induction › Mutual inductance between two coaxial coils, whe…
Mutual inductance between two coaxial coils, when current changes in the primary, is best defined as:
AFlux in secondary per unit current in primary
BEMF in primary per unit current in primary
CFlux in primary per unit current in primary
DResistance of secondary per unit current
Answer & Solution
Correct answer: A. Flux in secondary per unit current in primary
$M = \phi_{\text{secondary}}/I_{\text{primary}}$. By symmetry, this equals $\phi_{\text{primary}}/I_{\text{secondary}}$, so $M_{12} = M_{21}$.
Related questions
When a rod moves perpendicular to a magnetic field at constant velocity, the FREE charges An LC circuit oscillates with angular frequency ω equal to:Maxwell's correction to Ampère's law introduced:A bar magnet is dropped through a vertical conducting ring. The magnet:A coil of inductance 0.5 H carries a current changing at 4 A s⁻¹. The induced EMF is:A magnetic flux through a coil changes from 4 Wb to 1 Wb in 0.3 s. The average EMF inducedEddy currents are reduced in transformer cores by:A transformer works on the principle of: