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The field normal to the plane of a wire ...

The field normal to the plane of a wire of `n` turns and radis `r` which carriers `i` is measured on the axis of the coil at a small distance `h` from the centre of the coil. This is smaller than the field at the centre by the fraction.

A

`(3h^(2))/(2r^(2))`

B

`(2h^(2))/(3r^(2))`

C

`(3r^(2))/(3h^(2))`

D

`(2r^(2))/(3h^(2))`

Text Solution

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The correct Answer is:
A
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