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A wire of length l meter carrying curren...

A wire of length l meter carrying current i ampere is bent in form of circle. Magnetic moment is

A

`(L^(2)I^(2))/(4pi)`

B

`(LI)/(4pi)`

C

`(L^(2)I)/(4pi)`

D

`(LI)/(4pi)`

Text Solution

Verified by Experts

The correct Answer is:
C
Circumference of circle =`2piR`
`" " 2piR=L Rightarrow R=(L)/(2pi)`
`" " Area, piR^(2)=(piL^(2))/(4pi)=(L^(2))/(4pi)`
`" " "Magnetic mom",(mu)=IA=(IL^(2))/(4pi)`
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