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Exploratorium to Go
Question of the Week
What's Your (Electrical) Sign?
March 2, 2009 01:00
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Using drinking straws and plastic tape, learn how to quickly
build an
electroscope
, a device that detects electrical charge. Depending on how its handled, the plastic tape becomes either positively or negatively charged.
Objects with the same charge repel each other; objects with like charges attract each other.
Introduce a plastic comb into the mix and watch what happens.
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