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MHT CET Physics question

PhysicsElectromagnetic InductionMHT CET

A coil of wire of a certain radius has 100 turns and self inductance of 15 mH. The self inductance of a second similar coil of 500 turns will be

Answer: (B)

Solution

, so mH; 75 mH assumes \propto$

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Question ID VK-081579