No abstract

No abstract

A metal object placed in the alternating magnetic field of a current distribution experiences a lifting force (electromagnetic levitation) and heating. These effects are caused by eddy currents induced in the metal. The eddy currents also change the inductance of the current generator. A simple and accessible calculation is given of these effects for a sphere in the field of a single circular loop of alternating current. Hopefully these simple calculations will help towards the inclusion of eddy current effects in the upper undergraduate physics E M syllabus.

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