Physics Static Electricity and Ohm's Law SG

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What are the 3 types of charges?

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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

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

Charging by conduction involves all of the following EXCEPT:

a. touching a charged object to a neutral object

b. moving electrons from one object to another

c. only used when making an object neutral in charge

d. moving objects away from each other after touching

c. only used when making an object neutral in charge

T/F: Electroscope must have a known charge first.

true

Charging by INDUCTION

means charging w/o contact (w/ grounding wire)

Steps of INDUCTION

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)

charging by CONDUCTION

means charging w/ contact

Physics Static Electricity and Ohm's Law SG

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