gcse physics electricity

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2.20 describe experiments to investigate how insulating materials can be charged by friction Get a polyethene rod and rip up some small pieces of paper; the rod will have no effect on the paper. Rub the polyethene rod with a cloth, now the rod will attract the pieces of paper, this is because it now has a charge they are attracted to. xx Take a rod of plastic such as acetate or polythene and rub a cloth duster against them. This builds up static charge. Then take a positively charged material and tie it to a string so its suspended at the halfway line. Take the plastic rod and place it near to this material. If the rod is positive it will repel and if it's negative then it will attract.

structure of metal


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