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A circular coil of 'n' turns is kept in ...

A circular coil of `'n'` turns is kept in a uniform magnetic field such that the plane of the coil is perpendicular to the field. The magnetic flux associated with the coil is now `phi`. Now the coil is opened and made into another circular coil of twice radius of the previous coil and kept in the same field such that the plane of the coil is perpendicular to the field. The magnetic flux associated with this coil now is

A

`phi`

B

`2phi`

C

`(phi)/4`

D

`(phi)/2`

Text Solution

Verified by Experts

The correct Answer is:
B
`phi=Ban n(2pir) ="constant")`
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Knowledge Check

  • A circular coil of 'n' turns is kept in a uniform magnetic fielf such that the plane of the coil is perpendicualr to the field. The magnetic flux associated with the coil is now phi . Now the coil is opened and made inot another circular coil od twice radius of the pervious coil and kept in the same field such that the plane of the coil is perpendicular to the field. The magnetic flux associated with this coil now is

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  • Current I is flowing through a circular coil of radius r. It is placed in a magnetic field B0 in such a way that the plane of the circular coil is perpendicular to B0. The force acting in it will be -

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