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Part 2 of the Static Electricity lab Determining what charge is on the rod or strip
Using a Negatively charged Electroscope
+ + + + + + + - - - - - - Negative Charge by Conduction Negative rod makes contact - - - - - - - - - + + - - -
+ + + + + + + - - - - - - - + + + - + + + + - - - - - - - - - - - - - - - - - - - Electrons are added Creates a Bridge Like charges repel Leaves become negative - - - - - - - - - + + - -
+ + + + + + + - - - - - - - + + + + - - - - - - - - - - - - - - - - - - Permanent Negative Charge Remove Negative Rod Like charges still repel Leaves stay negative
+ + + + + + + - - - - - - - + + + + - - - - - - - ---- - - - - - - - - - - - Leaves spread further apart Leaves become more negative - More Electrons move down to leaves -- Negative rod comes near - - - - - - - - + + + - -
+ + + + + + + - - - - - - - + + + + - - - - - - - - - - - - - - - - - - - Remove Negative Rod Leaves spread less apart Leaves become less negative
+ + + - - - - - - ++ ++ - - - - - - - - - - - - - - - - - - - - + + + Positive rod brought near Electrons move up to sphere Leaves become neutral And start to fall or collapse
Part 3 of the Static Electricity lab Determining what charge is on the rod or strip
Using a Positively charged Electroscope
+ + + + + + + - - - - - - - Positive Charge by Conduction Positive rod makes contact - + + +
+ + + + + + + - - Electrons are removed Creates a bridge Like charges repel Leaves become positive - + + + - - -
+ + + + + + + - - - - - + + + Positive rod brought near Electrons move up to sphere Leaves become more positive Leaves spread further apart
+ + + + + + + - - Leaves spread less apart Leaves become less positive - - Remove positive rod
+ + + ++ ++ - - Leaves become neutral - - And start to fall or collapse Electrons move down to leaves - - + + + - - - - - - - Negative rod comes near
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