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Mutual inductance between two coils depends on
Acurrent in either coil (typical)
Btheir geometry and relative orientation
Cresistance of the coils
Dvoltage applied
Answer & Solution
Correct answer: B. their geometry and relative orientation
1. M = Φ_link / I from the source coil, where Φ_link is the flux linkage in the second coil.
2. Both Φ_link and I scale together as current changes, so the ratio is geometric.
3. Hence M depends only on geometry and orientation of the two coils (and any core).
_Source: Maharashtra Balbharati Std XII Physics, Ch 12 "Electromagnetic Induction" §12.6_
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