This (Quicktime) animation shows that an emf (and current) is induced in a coil if the flux through the coil increases due to a change in the area of the coil. It shows that (a) the emf (and current) is induced only when the magnetic flux passing though the coil changes, (b) the direction of the emf (and current) depends on whether the area is increasing or decreasing, and (c) the magntidue of the emf (and current) depends on the rate at which the area changes. Download the animation (6MB).

This animation was obtained from the "Core Concepts in Physics" CD-ROM produced by Saunders College Publishing. They are to be used for Educational Purposes only; do not copy.