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10th Class Science Magnetic Effects of Electric Current Question Bank Magnetic Effects of Electric Current

  • question_answer
    The variation of induced emf (e) with time (t) in a coil if a short bar magnet is moved along its axis with a constant velocity is best represented as

    A)                                    

    B)

    C)                   

    D)                               

    Correct Answer: B

    Solution :

    Polarity of e.m.f. will be opposite in the two cases while entering and while leaving the coil. Only in option polarity is changing.


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