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The radius of a circular current carryin...

The radius of a circular current carrying coil is R. The distance on the axis from the centre of the coil where the intensity of magnetic field is `(1)/(2sqrt(2))` times that at the centre, will be:

A

`2R`

B

`(3R)/2`

C

R is doubled

D

`R/2`

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The correct Answer is:
C
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