A wire of length `L metre ` , carrying a current `I `ampere is bent in the form of a circle . The magnitude of its magnetic moment is …………. ` MKS units ` .
A
`(IL)/(4pi)`
B
`(I^2L)/(4pi)`
C
`(IL^2)/(4pi)`
D
`(IL^2)/(pi)`
Text Solution
Verified by Experts
The correct Answer is:
C
`M= n I A =IA=I pi r^2` Here `L= 2pi r rArr r=(L)/(2pi)` `M=I pi ((L)/(2pi))^2=(IL^2)/(4pi)` .
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