A square current-carrying loop is placed in a uniform magnetic field B with the

Question

A square current-carrying loop is placed in a uniform magnetic field B with the plane of the loop parallel to the magnetic field. (See drawing). The dashed line is the axis of rotation. The magnetic field exerts:

a) a net torque, but not a net force, on the loop

b) a net force and a net torque on the loop

c) a net force, but not a net torque, on the loop

d) neither a net force nor a net torque on the loop

A square current-carrying loop is placed in a uniform magnetic field B with the plane of the loop parallel to the magnetic field. (See drawing). The dashed line is the axis of rotation. The magnetic field exerts: a net torque, but not a net force, on the loop a net force and a net torque on the loop a net force, but not a net torque, on the loop neither a net force nor a net torque on the loop

Explanation / Answer

a net torque but not a net force.

two perpendicluar sides wont experience anything as the charges flowing through them are in constant magnetic field. But the two horizontal sides will forces equal and opposite as the current flowing through them are in opposite direction. This equal and opposite force will create a torque as there line of action is different.

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