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Two short magnets each 'of dipole moment...

Two short magnets each 'of dipole moment M, are fastened perpendicularly nl their centres. The magnitude of magnetic field at a distance `d` from the centre on the bisector of the right angle is

A

`mu_0/(4pi)(2Msqrt2)/d^3`

B

`mu_0/(4pi)M/d^3`

C

`mu_0/(4pi)(Msqrt2)/d^3`

D

`mu_0/(4pi)(2M)/d^3`.

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