ElectroMagnetic InductionHard

Question

A wire of fixed length is wound on a solenoid of length ′l′ and radius ′r′. Its self inductance is found to be L. Now if same wire is wound on a solenoid of length l/2 and radius r/2, then the self inductance will be -

Options

A.2 L
B.L
C.4 L
D.8 L

Solution

L = μ0n2πr2 l

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