NEET Physics Self & Mutual Induction MCQ Question
What is the mutual inductance M of two long coaxial solenoids each of length l, if the inner solenoid has n1 turns per unit length and radius r1, and the outer solenoid has n2 turns per unit length and a relative permeability material μr filling its inside?
M = μr μ0 n1 n2 π r1² l
M = μ0 n1 n2 π r1² l
M = μr μ0 n1 n2 π r2² l
M = μr μ0 n1 n2 r1² / l
Correct Answer
Detailed Explanation
The mutual inductance depends on the permeability of the medium, the number of turns per unit length, and the geometry of the solenoids, as described by M = μr μ0 n1 n2 π r1² l.
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