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

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

NTA AbhyasNTA Abhyas 2020

Solution:

As $M \, \propto N_{1}N_{2}, \, $ therefore, $M$ remains the same.