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A current carrying circular loop of radi...

A current carrying circular loop of radius R is placed in the x-y plane with centre at the origin. Half of the loop with `xgt0` is now bent so that it now lies in the y-z plane.

A

1

B

`1/2`

C

`1/4`

D

`1/8`

Text Solution

Verified by Experts

The correct Answer is:
A
The magnitude of the magnetic moment of the circular loop M=1A =`1 pi r^(2)` and it is directed alkong the z axis as the coil is in the x y plane
(ii) When half of the loop is bent and it lies in the y-z plane the magnitude of its moment is M =` M//2` and it is directed along the x axis
Thus we have two semicircualr loops each of magnetic moment `M//2` but one is directed along x axis and the other along z axis
`therefore M_(net) lt M` or the magnituide of magnetic moment diminishes
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