Question

what are the uses of eddy current.

Answer 1

Eddy currents (also called Foucault currents) are loops of electrical current induced within conductors by a changing magnetic field in the conductor due to Faraday's law of induction. Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field. They can be induced within nearby stationary conductors by a time-varying magnetic field created by an AC electromagnet or transformer, for example, or by relative motion between a magnet and a nearby conductor. The magnitude of the current in a given loop is proportional to the strength of the magnetic field, the area of the loop, and the rate of change of flux, and inversely proportional to the resistivity of the material.

hope this helps....

Answer 2

They are rarely useful like, mainly being seen as something to avoid: by laminating transformer and motors for example, or using non-magnetic cable trays for single AC conductors..
Why it is rarely because there have been attempts to exploit also.
Hope this helps you friend
Thanks ✌️ ✌️