Battery - Avalanche Voltage



 

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 Code Number :   5E40.23?  

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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Condition :   Excellent   
Principle :   Electrode Materials in Acid Solutions  and Current Flow
Area of Study :  Electricity & Magnetism  
Equipment :   Flash bulbs, magnesium and copper electrodes, beaker, sulfuric or hydrochloric acid, tube clamp, and stand.
Procedure :   Connect the flash bulb to the copper and magnesium electrodes. Pour a small amount of FRESH sulfuric acid into the beaker and insert the copper electrode.  Quickly inserting the magnesium electrode will trigger the flash bulb showing a substantial current flow.  NOTE:  Works with any acid that sustains a high density current flow.  If fresh sulfuric acid is not available you may use hydrochloric acid in its place.

 

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Mail Questions and Comments to:  Dale Stille