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MHT CET 2026 (13 May, Shift 2) · Self-Inductance & Energy

Self-Inductance & Energy question from MHT CET 2026 (13 May, Shift 2)

Q7MHT CET 2026 · 13 MAY · SHIFT 2Easy

Self-Inductance & Energy

A coil of wire of radius $r$ has $600$ turns and a self-inductance of $108$ mH. The self inductance of a coil with same radius and $500$ turns is

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Answer: (b)

Same radius (same coil shape): $L \propto N^2$ .
$L_2 = 108\times\left(\dfrac{500}{600}\right)^2 = 108\times\dfrac{25}{36}$
$L_2 = 75\text{ mH}$
So the answer is (b) 75 mH.

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