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A current of 4A flows through a plane ci...

A current of `4A` flows through a plane circular coil of radius `4cm` having 20 turns. Calculate dipole of moment of the coil.

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Verified by Experts

The correct Answer is:
`0*3Am^2`
Here, `I=3A, r=4cm=4xx10^-2m`
`N=20`, `M=?`
`M=NIA=NIpir^2`
`=20xx3xx22/7(4xx10^-2)^2`
`=60xx22/7xx16xx10^-4Am^2=0*3Am^2`
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