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A very long bar magnet is placed with it...

A very long bar magnet is placed with its north pole coinciding with the centre of a circular loop carrying an electric current. `i`. The magnetic field due to the magnet at a point on the periphery of the wire is `B`. The radius of the loop is `a`. The force on the wire is

A

very nearly `2piaiB` perpendicular to the plane of the wire.

B

2piaiB` in the plane of the wire

C

`piaiB` along the magnet

D

zero

Text Solution

Verified by Experts

The correct Answer is:
A
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