When a magnet moves relative to a conducting, non-magnetic material (such as copper), some force slows...

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Electrical Engineering

When a magnet moves relative to a conducting, non-magneticmaterial (such as copper), some force slows down the magnet, andthis is attributed to \"eddy current.\" Describe in your own wordswhat this \"eddy current\" is, how it is caused, and how this eddycurrent affects the magnet which caused it.
In the demonstrations of eddy current, these demonstrationsinvolve non-conservation of mechanical energy. You see: (1) largemagnet slowing down to a stop at the end of a short drop, beforehitting the copper plate (loss of kinetic energy), (2) a magnetmoving downward at a constant velocity (loss of potential energy),or (3) a pendulum slowing down to a stop (loss of total mechanicalenergy). These mechanical energies are likely being lost to heat;explain the mechanism by which this loss happens. [Hint: Whathappens when a current flows in a material with non-zeroresistance?]

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4.2 Ratings (517 Votes)

According to Faradays law when the magnetic flux linking a circuit changes an electromotive force is induced in the circuit proportional to the rate of change of the flux linkage So when a magnet moves relative to a conducting material such as copper flux linkage to the nonmagnetic conducting material changes and according to Faradays law an electromotive force is induced in the nonmagnetic conducting material This electromotive force creates current inside the nonmagnetic conducting material This current is eddy current a localized electric current induced in a conductor by a varying magnetic fieldNow according to Lenzs lawthe direction of an induced current is always such as to oppose the change in the circuit or See Answer

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