An equilateral triangular loop is kept near to a current carrying long wire as shown fig. under the action of magnetic force alone, the loop

Options

A. must move along positive of negative X-axis
B. must move in XY plane and not along X- or Y-axis
C. does not move
D. moves but which way we cannot predict

Answer

A

Explanation

(a) The net force acting on the loop would be along X-axis (to
determine whether it is along +ve or -ve X-axis, calculation
has to be carried out) as shown in Fig.