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The magnetic field at a distance x on th...

The magnetic field at a distance `x` on the axis of a circular coil of radius `R` is `1/8th` of that at the centre. The value of x is

A

`R/sqrt3`

B

`(2R)/sqrt3`

C

`Rsqrt3`

D

`Rsqrt2`

Text Solution

Verified by Experts

The correct Answer is:
C
`B_x=1/8B_c`
`:. (mu_0NiR^2)/(2(R^2+x^2)^(3/2)=1/8[(mu_0Ni)/(2R)]`
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