Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Hard-Class 12
Given a long solenoid S1 with N1 turns and length l, carrying a current I1, and a coaxial solenoid S2 with N2 turns, what is the expression for the mutual inductance M12 between the two solenoids?
A
μ0 N1 N2 πr^2 / l
B
μ0 N1 N2 / l
C
μ0 N1 N2 r^2 / l
D
μ0 N1 N2 πr^2 l
Correct Answer
Option A
Detailed Explanation
The mutual inductance M12 between two coaxial solenoids is given by M12 = μ0 n1 n2 πr^2 / l, where n1 and n2 are the number of turns per unit length. This is derived from Eq. (6.9).
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