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The magnetic field at centre O of the ar...

The magnetic field at centre O of the arc in Fig.

A

`3M//pi `

B

`M//pi`

C

`2M//pi`

D

`3sqrt(3)M// pi`

Text Solution

Verified by Experts

The correct Answer is:
A
New magnetic moment .
`M = M xx (2 sin (theta //2))/(theta) = M xx (2xx (1//2))/(pi//3) = (3M)/(pi)`
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