D3 MAGNETISM RT43: WIRE LoOPS AND MOVING MAGNETS-LOOP MOTION ermanent magnet is
ID: 1585737 • Letter: D
Question
D3 MAGNETISM RT43: WIRE LoOPS AND MOVING MAGNETS-LOOP MOTION ermanent magnet is moving toward a circular wire loop that is fixed in place. All of the wire loops are identical, n ahalbt the wire in Case D has a small gap. The magnets are all identical, but they are approaching the ne s at different speeds and with different poles facing the loops. At the instant shown, all of the magnets are the same distance from the wire loops. v=4m/s v=5m/s v=2m/s v=5m/s -Small gap Rank the magnitude of the repulsive force on the loop by the approaching magnet at the instant shown. OR All Cannot All the same zero determine Greatest Least Erplain your reasoning.Explanation / Answer
If rate of change of flux is maximum than according to lenz law ring will try to oppose this change by producing induced electric field which further generate opposite flux to minimize the change in flux.
Hence we can conclude that repulsive force is directly proportional to change in flux i.e its velocity
B>A>C>D
Case D have lowest repulsive force because ring is incomplete hence there will not be any induced current
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