This project clearly demonstrates the powerful mechanical forces due to a pulsed magnetic field. A simple coil consisting of several turns is formed to allow fitting of an aluminum can. A high peak current is switched into the coil at f(t) and now induces a current flow in the periphery of the can that now generates its own magnetic field in opposition, causing the can to constrict into the familiar hour glass configuration. There is no mechanical constriction from the coil -- all of the action comes from the pulsed magnetic field, making the coil appear to collapse as if by an unseen hand.

This project is an excellent demonstration and is used in several museums where students are encouraged to bring in their cans and subject them to these forces. Safety is enhanced by the positive grounding of the inducing coil eliminating any steady state potentials. Operator simply places can into the coil, depresses the charge button, waits for the green light and now presses the fire button. Deformed can is removed and system is ready for the next operator.

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