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A short bar magnet of magnetic moment 5√...

A short bar magnet of magnetic moment `5√3×10^(-2)` `JT^(-1)` is placed with its Axis normal to the earth's horizontal magnetic field. The distance from the centre of a magnet, at its equatorial position, where the resultant field makes an angle 60° with its horizontal field is `(B_H= 0.4×10^(-4) T)`

A

`5(3)^(1/3)` cm

B

`5` cm

C

`5(6)^(1/3)` cm

D

`10` cm

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