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# Physics Static Electricity and Ohm's Law SG

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If you use a positively charged electroscope to determine the charge on an unknown charged rod. You observe the behavior of the electroscope and determine that the unknown charged rod is actually a negative charge. You know this b/c the electroscope's:

a. leaves move towards each other by increasing the number of electrons in the leaves

b. leaves move towards each other by decreasing the number of electrons in the leaves

c. leaves move away from each other by increasing the number of electrons in the leaves

d. leaves move away from each other by decreasing the number of electrons in the leaves
1. bring charged rod NEAR a neutral conductor

2. opposite charges attracted, like charged repel

3. attach grounding wire to far side

4. repelled charges will spread out into wire/ removed similar charges at far end

5. DISCONNECT grounding wire, then remove charged rod

6. conductor now charged with "opposite" charge

(Baby Octopi Attract Reptiles During Card games)