5A10.10 - Electrostatic Charges

Code Number:
Demo Title:
Electrostatic Charges
Area of Study:
Electricity & Magnetism
Ebonite Rod, Lucite Rod, Glass Rod, Cats Fur, Silk, Latex Rubber, Desiccators with Drying Agent, Electrometer, Wire Cage and Charging Paddle, Electroscope, Pith-balls.

During high humidity months the cats fur and silk cloth should be desiccated overnight.

The glass rod and silk will give a positive charge.  The clear acrylic rod when rubbed with silk will also give a positive charge.

The ebonite and cats fur will be negatively charged as will the Lucite rod and latex.  The PVC rod rubbed with cats fur will also give a negative charge.  The Lucite rod will be charged only where the rod was rubbed.

Add some humor to the lecture.  Instead of using the PVC rod and cats fur, try the pink flamingo and the oven bag as your charging pair.  A Zigmund Peacock original.

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Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.