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The earth's magnetic field may be consid...

The earth's magnetic field may be considered to be due to a short magnet placed at the centre of the earth annd oriented along the magnetic south-north direction. The ratio of the magnitude of the magnetic field on the earth's magnetic equator to that at the magnetic poles is

A

`1:2`

B

`2:1`

C

`1:4`

D

`4:1`

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The correct Answer is:
A
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