Consider the metal ring and the bar magnet shown in the figure. The rightmost pa
ID: 1507139 • Letter: C
Question
Consider the metal ring and the bar magnet shown in the figure. The rightmost part of the ring is farther from you; the leftmost part of the ring is closer to you. The ring is shown almost edge-on, but twisted slightly about a vertical axis in the plane of the page so that the leftmost part of the ring is the part of the ring closest to the viewer. The bar magnet is to the right of the ring, located on the ring axis, and aligned with the ring axis with the north pole closer to the ring.
(a) Suppose the magnet is being moved towards the metal ring. Will there be a current in the metal ring as a result, and if so, in what direction will that current flow (in which direction will the hypothetical positive charges circulate)?
a.) No, there will be no current in the metal ring.
b.) Yes, in the counterclockwise direction as viewed from the right.
c.) Yes, in the clockwise direction as viewed from the right.
(b) Suppose the magnet is being moved away from the metal ring. Will there be a current in the metal ring as a result, and if so, in what direction will that current flow (in which direction will the hypothetical positive charges circulate)?
a.)No, there will be no current in the metal ring.
b.)Yes, in the clockwise direction as viewed from the right.
c.)Yes, in the counterclockwise direction as viewed from the right.
(c) Suppose the magnet is moved leftward so that it passes through the metal ring, and then the magnet is held stationary. Will there be a current in the metal ring while the inserted magnet is being held stationary, and if so, in what direction will that current flow (in which direction will the hypothetical positive charges circulate)?
a.) No, there will be no current in the metal ring.
b.) Yes, in the counterclockwise direction as viewed from the right.
c.) Yes, in the clockwise direction as viewed from the right.
Explanation / Answer
(a) b). Yes, in the counterclockwise direction as viewed from the right.
(b) b).Yes, in the clockwise direction as viewed from the right.
(c) a).No, there will be no current in the metal ring.