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A short bar magnet is placed in the magn...

A short bar magnet is placed in the magnetic meridian with its north pole pointing towards geographical south. A neutral point is found at a distance of 30 cm from the centre of the magnet. If the horizontal component of earth's field is 0.4G , calculate the magnetic moment of the magnet .

A

`7.44"ampere"xx "metre"`

B

`77.4"ab-ampere" xx cm`

C

`18.5"ampere" xx "metre"`

D

`185"ab-ampere" xx cm`

Text Solution

Verified by Experts

The correct Answer is:
B
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