12th Class Physics Electro Magnetic Induction Question Bank MCQ - Electromagnetic Induction

  • question_answer
    If numbers of turns in primary and secondary coils is increased to two times each, the mutual inductances:

    A) becomes 4 times            

    B) becomes 2 times

    C) becomes \[\frac{1}{4}\] times    

    D) remain unchanged

    Correct Answer: A

    Solution :

    (a) becomes 4 times                         \[m\propto {{n}_{1}}{{n}_{2}}\]             \[\therefore \]      m becomes 4 times


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