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A light disc made of aluminum (a nonmagnetic material) is kept horizontally and is free to rotate about its axis as shown. 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…
A) rotate in the direction opposite to the direction of magnet’s motion.
B) rotate in the same direction of magnet’s motion.
C) not rotate and its temperature will remain unchanged.
D) not rotate but its temperature will slowly rise.

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