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A copper wire coil, when moved through a magnetic field, creates a current in the coil. The current is induced through the breaking of the magnetic field lines.
This exhibit provides three variations of the coil to provide a comparison. There is a standing coil with 20 windings, a lying coil also with 20 windings, and a second lying coil, this time with only 5 windings.
We developed a special signal amplifier to detect the very weak current
generated. The resultant signal strengths and polarity are then shown
on the LED display. The exhibit was built in 1999 for the Technical
Museum, Vienna.
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