Summary: Investigating Physics | 9780717145881 | Andrew Kenny
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4 electricity
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4.1 static electricity
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Electric charge is a --- quantity with SI unit..?
scalar quantity, SI unit- Coulomb (C)
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How do you charge by induction?
Presence of near charged body.
Insulated conductors can be charged this way.- charged body close to I.C. (seperates charges)
- earth side furthest away from C.B.
- remove earth then remove charged body.
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How do you charge 2 bodies by induction?
- 2 insulated conductors touching
- Hold charged rod nearby
- separate insulated conductors
- remove rod
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What is used to detect charge?
Gold leaf electroscope
Like charge leaf rises, unlike charge leaf falls
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How would you show that static charge on an insulated conductor always resides on outside
proof plane ... van der graafs generator+ GLE
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How is charge held on a pointed sphere?
Around point. can lead to point discharge
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4.3.1 Current
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What prevents the flow of charge?
Insulator
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4.3.2 Voltage
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What does charge lose as it moves around a circuit? to what>?
energy, to Heat
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How do you calculate resistors in series
add them
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How do you calculate resistors in parallel?
1/R=1/R1 + 1/R2 +1/R3
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