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The dipole moment of a short bar magnet ...

The dipole moment of a short bar magnet is `1.25 A-m^(2)`. The magnetic field on its axis at a distance of 0.5 metre from the centre of the magnet is

A

`1xx10^(-4)NA^(-1)m^(-1)`

B

`2xx10^(-6)NA^(-1)m^(-1)`

C

`4xx10^(-2)NA^(-1)m^(-1)`

D

`6.64xx10^(-8)NA^(-1)m^(-1)`

Text Solution

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The correct Answer is:
B
The magnetic field at a point on the axis of a bar magnet
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