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Points A and B are situated perpendicula...

Points `A` and `B` are situated perpendicular to the axis of a `2cm` long bar magnet at large distances `X` and `3X` from its centre on opposite sides. The retio of the magnetic fields at `A` and `B` wil be approximately equal to

A

`27 : 1`

B

`1 : 27`

C

`9 : 1`

D

`1 : 9`

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The correct Answer is:
A
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