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A wire of magnetic moment M is moulded a...

A wire of magnetic moment M is moulded according to figure, then magnetic moment becomes:

A

`(sqrt(2)M)/pi`

B

`(2M)/i`

C

`(2sqrt(2)M)/i`

D

`M/pi`

Text Solution

Verified by Experts

The correct Answer is:
C
`M = ml`
`M. = ml.`
[Here `l. = sqrt(2)R` and `l = (piR)/2`]
`rArr M/M^(.) = l/l^(.) = (piR//2)/(sqrt(2)R)`
`rArr M. = (2sqrt(2)M)/pi`
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