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A circular coil of radius 4 cm having 20...

A circular coil of radius 4 cm having 20 turns carries a current of 3A.It is a magnetic field of intensity 0.5 `Wb//m^(2)`.The magnetic dipole moment of the coil is

A

`0.3 Am^(2)`

B

`1.3 Am^(2)`

C

`0.15 Am^(2)`

D

`0.6 Am^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
r=4cm,n=20,I=3A,B=0.5T,M=?
M=nIAltbrge`nlpir^(2)`ltbrge`20xx3xx3.14xx16xx10^(-4)`
`=0.3 Am^(2)`
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