A bar magnet of pole strnegth 2A-m is ke...

A bar magnet of pole strnegth `2A-m` is kept in a magnetic field of induction `4xx10^(-5)wbm^(-2)` such that the axis of the magnet makes an angle `30^(@)` with the directon of the field. The couple acting on the magnet is found `80xx10^(-7)N-m`. Then the distance between the poles of the magnet is

`20m`

`2m`

`3cm`

`20cm`

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NARAYNA-MAGNETISM-LEVEL-II (H.W)

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