A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments $P S, S R$ and $R Q$ are $F_1, F_2$ and $F_3$ respectively and are in the plane of the paper and along the directions shown, the directions shown, the force on the segment $Q P$ is

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Aicharya · Accepted Answer

$\begin{aligned} & F_4 \sin \theta=F_2 \ & F_4 \cos \theta=\left(F_3-F_1\right) \ \therefore \quad & F_4=\sqrt{\left(F_3-F_1\right)^2+F_2^2} \end{aligned}$ For a closed loop there is no translation.

A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on…

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