A) Generation of electromagnetic wave during the passage of a magnet through a metal pipe
B) Change of the direction of propagation of electromagnetic wave due to a variable magnetic flux
C) Change of the frequency of electromagnetic wave due to a variable magnetic flux
D) To slow down the motion of a magnet moving through a metal pipe due to electromagnetically induced current.
Correct Answer: D
Solution :
Option [d] is correct. Explanation: The retarding force due to the eddy currents inhibits the motion of the magnet in a metal pipe. This phenomena is known as electromagnetic damping.
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