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WHERE TO FIND A "GROUND"

Some types of electrostatic experiments require a connection to "earth" or "ground". Here are some places where electrical ground can be found:

  1. A metal stake hammered into damp earth outdoors
  2. Cold water pipe, or metal faucet on a sink
  3. Screw which holds the plastic plate onto an electric outlet
  4. 3rd prong of any American electric outlet (dangerous for kids.)
During a science fair, sometimes you can use a metal table top as your "ground." If nothing else is available, spread a long sheet of aluminum foil on the floor and use it as "ground" (if the humidity is very low, this might NOT work very well, but it's better than nothing.)






http://amasci.com/emotor/ground.html
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