Question

Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon:

• A. the rates at which currents are changing in the two coils
• B. the relative position and orientation of the two coils
• C. the materials of the wires of the coils
• D. the currents in the two coils

Hint:

Mutual inductance depends on the geometry, orientation, and coupling of the coils, not on the material of the wires.

Answer 1

The Correct Option is B

Mutual inductance between two coils is quantified by:

\[ M = \frac{\Phi}{I}, \]

Here, \( \Phi \) represents the magnetic flux in one coil induced by the current \( I \) in the other.

The factors influencing mutual inductance are:

• The spatial arrangement and alignment of the coils, which dictate magnetic field coupling.
• The turns count and physical dimensions of the coils.
• The magnetic properties of the intervening medium.

Mutual inductance is independent of the current magnitude and the coil wire material itself.