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MHT CET Physics question

PhysicsElectromagnetic InductionMHT CET

The number of turns of primary and secondary coils of a transformer are 5 and 10 respectively and mutual inductance of the transformer is 25H. Now, number of turns in primary and secondary are made 10 and 5, respectively. Mutual inductance of transformer will be

Answer: (A)

Solution

and the product is unchanged, so M stays 25 H;

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Question ID VK-082190