Two short magnets of equal dipole moments $M $ are fastened perpendicularly at their centre (figure). The magnitude of the magnetic field at a distance $d $ from the centre on the bisector of the right angle is

137-13

  • A

    $\frac{{{\mu _0}}}{{4\pi }}\frac{M}{{{d^3}}}$

  • B

    $\frac{{{\mu _0}}}{{4\pi }}\frac{{M\sqrt 2 }}{{{d^3}}}$

  • C

    $\frac{{{\mu _0}}}{{4\pi }}\frac{{2\sqrt 2 M}}{{{d^3}}}$

  • D

    $\frac{{{\mu _0}}}{{4\pi }}\frac{{2M}}{{{d^3}}}$

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