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

  • question_answer
    Magnetic intensity for an axial point due to a short bar magnet of magnetic moment M is given by [MP PET 1984; CPMT 1974; Pb. PMT 1999]

    A)            \[\frac{{{\mu }_{0}}}{4\pi }\times \frac{M}{{{d}^{3}}}\]      

    B)            \[\frac{{{\mu }_{0}}}{4\pi }\times \frac{M}{{{d}^{2}}}\]

    C)            \[\frac{{{\mu }_{0}}}{2\pi }\times \frac{M}{{{d}^{3}}}\]      

    D)            \[\frac{{{\mu }_{0}}}{2\pi }\times \frac{M}{{{d}^{2}}}\]

    Correct Answer: C

    Solution :

               \[{{B}_{a}}=\frac{{{\mu }_{0}}}{4\pi }\frac{2M}{{{d}^{3}}}=\frac{{{\mu }_{0}}}{2\pi }\frac{M}{{{d}^{3}}}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner