A closed loop PQRS carrying a current is placedin auniform magnetic field. If the magnetic force on the segments PS,SR and RQ are `F_(1),F_(2)"and" F_(3)` respectively and are in the plane of the p[aper and along the directions shown in the figure, the force on the segment QP is

Options

A. `F_(3)-F_(1)-F_(2)`
B. `sqrt((F_(3)-F_(1))^(2)+F_(2)^(2))`
C. `sqrt((F_(3)-F_(1))^(2)-F_(2)^(2))`
D. `F_(3)-F_(1)+F_(2)`

Answer

B