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

The mutual inductance between two coils is defined as: \[ M = \frac{\Phi}{I}, \] where \( \Phi \) is the magnetic flux in one coil due to the current \( I \) in the other coil. \\ The mutual inductance depends on: \\ The relative position and orientation of the two coils (determines the coupling of magnetic fields). \\ The number of turns and dimensions of the coils. \\ The magnetic permeability of the medium between the coils. \\ It does not depend directly on the current or the material of the coil wires.