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  4. A circular coil ABCD carrying a current ' i ' is placed in a uniform magnetic field. If the magnetic force on the segment AB is vecF, the force on the remaining segment BCDA is

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Q. A circular coil $ABCD$ carrying a current $' i '$ is placed in a uniform magnetic field. If the magnetic force on the segment $AB$ is $\vec{F}$, the force on the remaining segment $BCDA$ isPhysics Question Image

NEETNEET 2013Moving Charges and Magnetism

Solution:

The net magnetic force on a current loop in a uniform magnetic field is always zero.
$\therefore \vec{F}_{A B}+\vec{F}_{B C D A}=0$
$\vec{F}_{B C D A}=-\vec{F}_{A B}=-\vec{F}$

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