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The magnetic field at the centre of a cu...

The magnetic field at the centre of a current carrying circular loop of radius R, is `B_(1)`. The magnetic field at a point on its axis at a distance R from the center of the loop is `B_(2)`. Then the ratio `(B_(1)//B_(2))` is

A

`2sqrt2`

B

`1/sqrt2`

C

`sqrt2`

D

-2

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