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First Law of Motion

The motion of...

Question

The motion of a copper plate is damped when it is allowed to oscillatebetween the magnetic pole-pieces. How is the damping force, produced bythe eddy currents?

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Solution

Eddy currents cause electromagnetic damping. Eddy currents oppose the change in magnetic flux, i.e. they oppose the motion of magnet. Hence, they cause damping.

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