Eddy currents are currents that circulate in conductors like swirling eddies in a stream. They are induced by changing magnetic fields and flow in closed loops, perpendicular to the plane of the magnetic field.
They arise when a conductor moves through a magnetic field, or when the magnetic field surrounding a stationary conductor is varying. To summarise, we can say that anything which results in the conductor experiencing a change in the intensity or direction of a magnetic field produces eddy currents.
Uses of eddy current
The two uses of eddy current are:
- It is used in household current meters to measure power consumption.
- It is used to check whether the material or surface has any discontinuities, fractures, or faults without harming the material.