Q. Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon the
(i) rate at which current change in the two coils
(ii) relative position and orientation of the coils
(iii) rate at which voltage induced across two coils
(iv) currents in the two coils
Answer: (ii) relative position and orientation of the coils
Correct option is relative position and orientation of the coils, Mutual inductance of a pair of two coils depends on the relative position and orientation of two coils, other statements are incorrect.