A closed loop $PQRS$ carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments $PS, SR$ and $RQ$ 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 $QP$ is
A closed loop $PQRS$ carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments $PS, SR$ and $RQ$ 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 $QP$ is
- [AIPMT 2008]
- A
$\sqrt {{{\left( {F_3 - F_1} \right)}^2} - F_2^2} $
- B
$F_1+F_2+F_3$
- C
$-F_1+F_2+F_3$
- D
$\;\sqrt {{{\left( {F_3 - F_1} \right)}^2} + F_2^2} $
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