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A bar magnet is made to fall through a long vertical copper tube the speed of the magnet as a function of time is best represented by graph |
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Answer» Answer: an exponentially increasing graph with decreasing slope to reach a terminal velocity. It will attain a terminal velocity because as the velocity will increase the CHANGE of flux across the IMAGINARY rings will increase at a faster RATE so according to Lenz law the force acting on it will START decreasing the velocity by working against the WEIGHT of the magnet. the acceleration of the magnet will decrease as the velocity increase because the rate of change of velocity is decreasing because the magnetic force is acting opposite to the weight of magnet and hence net force acting on magnet will decrease and hence acceleration. At terminal velocity of the magnet the magnetic force will be equal to the weight of the magnet as the rate of change of velocity is zero and net force is also zero. It means the magnetic force is cancelling the weight of magnet. MARK AS BRAINLIEST |
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