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$\mathrm{P}\mathrm{S}$,$\mathrm{SR}$and$\mathrm{R}\mathrm{Q}$are${\mathrm{F}}_1$,${\mathrm{F}}_2$and${\mathrm{F}}_3$respectively and are in the plane of the paper and along the directions shown, the force on the segment$\mathrm{Q}\mathrm{P}$is