A square loop of current-carrying wire with edge length a is in the xy plane, the origin being at its center.Along which of the following lines can a charge move without experiencing a magnetic force?
A)x = 0, y = a/2
B)x = a/2, y = a/2
C)x = a/2, y = 0
D)x = 0, y = 0
E)x = 0, z = 0

Question

Quizplus · Accepted Answer

Along the line x = 0, y = 0, the charge would not experience any magnetic force as there is no current passing through the section of the wire it is passing through. At any other point on or near the loop, the charge would experience a magnetic force due to the current in the wire.

A Square Loop of Current-Carrying Wire with Edge Length a Is