Disclaimer:

Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

The demonstrations contained and referenced herein are listed for the purposes of cataloging and describing physics demonstrations which should be conducted only under the direction of a trained instructional support professional or physicist. These demonstrations are not presented for the purpose of being conducted by persons unconnected to this Facility and/or persons not consulting with or being supervised by the recognized instructional support professional or physicist and his/her staff. The University is responsible only for those demonstrations carried out using its own equipment using established safety and scheduling policies, and bears no responsibility for those choosing to use this source material for their own purposes. All demonstrations described and contained herein are public domain, and can also be found in reference materials in libraries, bookstores, and electronic sources.

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Connect the Genecon to the 1 F capacitor and count the number of turns that you make with the Genecon.   Let go of the handle and the capacitor will discharge back through the Genecon and make it act like a motor (the handle will turn).  Interestingly enough the handle will turn in the same direction that you were turning it when you charged the capacitor.  Details of why this is can be found in the file.

Connect the 10,000 MFD capacitor to the 150 VDC power supply.  Charge to about 110 volts.  Disconnect the capacitor and connect it to the 7.5 watt light bulb.  It should take about 1 minute until the light bulb no longer glows visibly.