question_answer

           The figure below depicts a circular loop of radius R carrying a fixed current I. The upper half of the loop is placed in a uniform magnetic field of magnitude B, perpendicular to the plane of the paper, as shown. The magnitude of the force on the loop is (neglect gravity)

A) BIR

B) 2BIR

C) \[\pi BIR\]

D) \[2\pi BIR\]