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A current of 10 A is flowing through ...

A current of 10 A is flowing through a circular coil of 5 turns each of radius 7 cm the coil lies in the X-Y plane what is the magnitude and direction of the magnetic dipole mometn associated with it ?

A

0.47 `am^(2)` along Z axis

B

`0.77 Am^(2)` along Z axis

C

`0.77 Am^(2)` along Y axis

D

`1.54 Am^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
Magnetic dipole moment
`M=nIA=nI.(pir^(2))`
`=5xx10xx22/7xx7/100xx7/100`
`=0.77 Am^(2)`
The direction of M is perpendicular to the plane of the coil Hence it is along the Z axis
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