Question

State any two uses of eddy currents?

Answer 1

Definition of eddy's current

: An electric current induced by an alternating magnetic field

1. Eddy currents are induced currents in the body of the conductor when subjected to changing magnetic flux. They are also known as Foucault current after the name of the scientist Foucault. They are known as eddy currents as they are in the pattern of eddies in the water.
2. Eddy currents are loops of electrical current induced within conductors by a changing magnetic field in the conductor according to Faraday’s law of induction. Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field.

In the figure shown, the DUT(device under test) is a conducting material. When the coil is placed above it, the magnetic field produced by the coil induces the production of an electric field around it. This electric field is called the Eddy current.

Uses of eddy's current

The two uses of eddy current are:

1. It is used in household current meters to measure power consumption.
2. It is used to check whether the material or surface has any discontinuities, fractures, or faults without harming the material.