Practice portal › Electromagnetic Induction › Eddy Currents
Asked in NEET 1988 · Eddy currents and damping
Eddy currents are induced currents that circulate within the body of a conductor rather than
along a wire.
They need a changing magnetic flux through the metal, which is exactly what a varying magnetic
field provides.
A steady field gives (dφ)/(dt)=0 and so no emf at all.
These currents are a nuisance in transformer cores, where laminations suppress them, and useful
in induction furnaces and magnetic brakes, where they are deliberately encouraged.
Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.
Practise this with a timer