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A circular coil of radius R carries a cu...

A circular coil of radius `R` carries a current `i`. The magnetic field at its centre is `B`. The distance from the centre on the axis of the coil where the magnetic field will be `B//8` is

A

` R sqrt(2)`

B

`Rsqrt(3)`

C

2R

D

3R

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The correct Answer is:
B
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