A light aluminium disc is horizontal and free to rotate about its axis. A strong magnet is held vertically above the disc away from its axis. If the magnet is revolved about the disc axis, the disc will:

Options

• Option A

  rotate in the direction opposite to the direction of magnet's motion

• Option B

  rotate in the same direction as the direction of magnet's motion

• Option C

  not rotate and its temperature will remain unchanged

• Option D

  not rotate but its temperature will slowly rise