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

Question

A square current-carrying loop is placed in a uniform magnetic field B, with the plane of the loop perpendicular to the direction of the field. The dashed line is the axis of rotation. The magnetic field exerts _____________

A)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 perpendicular to the direction of the field. The dashed line is the axis of rotation. The magnetic field exerts _____________ A)neither a net force nor a net torque on the loop. B) a net force, but not a net torque, on the loop. C) a net force and a net torque on the loop. D) a net torque, but not a net force, on the loop.

Explanation / Answer

Because of symmetry, the net force is equal to 0 The torque = x B (cross-product) The angle between and B is 0, so the = 0 The right answer is neither a net force or a net torque

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