Question

There are two long co – axial solenoids of same length I. The inner and outer coils have radii r₁ and r₂ and number of turns per unit length n₁ and n₂ respectively. The ratio of mutual inductance to the self – inductance of the inner – coil is:
(A) (n₁/n₂)
(B) (n₂/n₁). (r₁/r₂)
(C) (n₂/n₁). (r₂²/r₁²)
(D) (n₂/n₁)

Answer 1

Answer:

option 4 is correct

Explanation:

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