Physics - Magnetism Question with Solution | TestHub

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