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  4. Current I is flowing in a conducting circular loop of radius R. It is kept in a magnetic field B which is perpendicular to the plane of circular loop. Find the magnetic force acting on the loop:

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Q. Current $ I $ is flowing in a conducting circular loop of radius $R$. It is kept in a magnetic field $B$ which is perpendicular to the plane of circular loop. Find the magnetic force acting on the loop:

Rajasthan PMTRajasthan PMT 2002

Solution:

When a loop (of any size) is placed in a magnetic field, then the force acting on the loop is $ iRB. $