A square loop of wire with a small resistance is moved with constant speed from

Question

A square loop of wire with a small resistance is moved with constant speed from a field free region into a region of uniform B field (B is constant in time) and then back into a field free region to the right. The self inductance of the loop is negligible. False g When entering the field the coil experiences a magnetic force to the right. True Q Upon leaving the field, a clockwise current flows in the loop. § Upon entering the field, a counterclockwise current flows in the loop. False 3 When leaving the field the coil experiences a magnetic force to the right, submit Answer incorrect. Tries 9/20 Previous Tries

Explanation / Answer

A) False
The coil is moving to right. Therefore the magnetic force will be to the left.

B) True.
When the loop is leaving the field, then the magnetic flux through the loop decreases. Therefore induced magnetic field will try to increase the magnetic flux i.e. the inducued magnetic field will be in the same direction as the applied magnetic field. The applied magnetic field is into the plane of figure. Therefore the induced magnetic field is also into the plane of figure. For that the current should be clockwise.

C) False

D) False
The coil is moving to right. Therefore the magnetic force will be to the left.

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