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When a magnet falls through a metal ring, acceleration through the metal ring during the free falls is A. less than g throughout its fall B. less than g when it is above the ring and more than g when it is below the ring C. more than g throughout its fall D. more than g when it is above the ring and less than g when it is below the ring

When a magnet falls through a metal ring, acceleration through the metal ring during the free falls is A. less than g throughout its fall B. less than g when it is above the ring and more than g when it is below the ring C. more than g throughout its fall D. more than g when it is above the ring and less than g when it is below the ring

Grade:upto college level

1 Answers

Saurabh Koranglekar
askIITians Faculty 10341 Points
one year ago
As the magnet falls, the magnetic flux linked with the ring changes. This sets up an induced emf and a hence an induced current in the ring. The direction of an induced current is so as to oppose the downward motion of the magnet. Hence, the acceleration of the falling magnet is less than that due to gravity.

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