JEE Main & Advanced Physics Magnetism Question Bank Magnet and its Properties

  • question_answer
    What happens to the force between magnetic poles when their pole strength and the distance between them are both doubled                         [CPMT 1978, 80, 84, 85; MP PET 2005]

    A)            Force increases to two times the previous value

    B)            No change

    C)            Force decreases to half the previous value

    D)            Force increases to four times the previous value

    Correct Answer: B

    Solution :

               \[F\propto \frac{{{m}_{1}}{{m}_{2}}}{{{r}^{2}}}\]


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