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MHT CET 2026 Physics question

PhysicsElectromagnetic InductionMHT CET 2026

The self inductance of an air-core inductor (solenoid) is 0.03 mH. By introducing an iron core into inductor the self-inductance increases to 30 mH. The relative permeability of the core used is

Answer: (D)

Solution

For a solenoid , so with the same geometry . Hence \frac{L_{core}}{L_{air}}\frac{30\ mH}{0.03\ mH}$ =

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Question ID VK-101594