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A 10 cm long bar magnet of magnetic mome...

A 10 cm long bar magnet of magnetic moment 1.34 Am2 is placed in the magnetic meridian with its south pole pointing geographical south. The neutral point is obtained at a distance of 15 cm from the centre of the magnet. Calculate the horizontal component of earth’s magnetic field.

A

`0.12 xx 10^(-4) T`

B

`0.21 xx 10^(-4) T`

C

`0.34 xx 10^(-4) T`

D

`0.87 xx 10^(-7) T`

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