Question

For each situation below determine the direction of the induced current in the loop (if there is one).

(a) A square loop is moving at a constant velocity to the right through a uniform magnetic fieldthat is directed into the page and which extends out of the picture to the left and right. In which direction is the induced current in the loop?

[ ] clockwise [ ] counter-clockwise [ ] there is no induced current Justify your answer (with words, pictures, or both):

(b) A circular loop is at rest in a magnetic field directed into the page. The magnetic field is increasing in magnitude. In which direction is the induced current in the loop?

[ ] clockwise [ ] counter-clockwise [ ] there is no induced current Justify your answer (with words, pictures, or both):

(c) A piece of wire is wrapped into a loop and placed in a uniform magnetic field that is directed into the page. You then pull on the ends of the wire so the area of the loop is decreasing. In which direction is the induced current in the loop?

[ ] clockwise [ ] counter-clockwise [ ] there is no induced current Justify your answer (with words, pictures, or both):

(d) A bar magnet is held near the center of a wire loop. The magnet is then pulled away from the loop. The north pole is always closest to the loop. In which direction is the induced current in the loop? (The direction as seen by the north pole of the magnet.)

[ ] clockwise [ ] counter-clockwise [ ] there is no induced current Justify your answer (with words, pictures, or both):

Answer 1