A light disc made of aluminium (a nonmagnetic material) is kept horizontally and is free to rotate about its axis as shown in the figure. A strong magnet is held vertically at a point above the disc away from its axis. On revolving the magnet about the axis of the disc, the disc will (figure is schematic and not drawn to scale)-
1
rotate in the direction opposite to the direction of magnet’s motion
2
rotate in the same direction as the direction of magnet’s motion
3
not rotate and its temperature will remain unchanged
4
not rotate but its temperature will slowly rise