A) the magnet should not touch inner wall of the pipe.
B) the magnet should touch the inner wall of the pipe.
C) it does not matter whether the magnet touches the inner wall of the pipe or not.
D) the magnet should be larger in size than the diameter of the pipe.
Correct Answer: A
Solution :
Option [a] is correct. Explanation: To observe electromagnetic damping, a magnet should be dropped through a metal pipe and the magnet should not touch the inner wall of the pipe.
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