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A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segment 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
img src=https://penpencil-static-content.s3.ap-south-1.amazonaws.com/5eb393ee95fab7468a79d189/0quvucqdqsqv8hd17v4gwqgui.png width=171 height=185 /
(1) \( \sqrt{\left(F_{3}-F_{1}\right)^{2}-F_{2}^{2}} \)
(2) \( F_{3}+F_{1}-F_{2} \)
(3) \( F_{3}-F_{1}+F_{2} \)
(4) \( \sqrt{\left(F_{3}-F_{1}\right)^{2}+F_{2}^{2}} \)
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