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Uses of Eddy Current

When a piece ...

Question

When a piece of iron is placed in a time varying magnetic field, it gets heated. Identify the possible reason of this heating.

A

Eddy current

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B

Faraday's current

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C

Fleming's current

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D

None of the above

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Solution

The correct option is A Eddy current
The continuous change in magnetic flux through the rod induces current in it. These currents are called eddy currents because the direction of these currents are like those of eddies. Eddy currents are undesirable since they heat up the core and cause unnecessary dissipation of power.

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