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The magnetic field at a point x on the a...

The magnetic field at a point x on the axis of a small bar magnet is equal to the field at a point y on the equator of the same magnet. The ratio of the distances of x and y from the centre of the magnet is

A

`2^-3`

B

`2^3`

C

`2^1/3`

D

`2^-1/3`

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