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What is grounding?
Provide pathway for extra electrons to leave
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What does an Ammeter measure?
I current (amps)
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What are the component units of Amperes?
Coulombs / Sec
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Why does the current stop increasing?
Resistance in the circuit
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What is the symbol for resistivity?
ρ Rho
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What is the symbol for ResistANCE?
R
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What is the ResistANCE for a wire?
ρL/A
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When do you get maximum resistANCE for a wire?
- Large L, Small A
- R=ρL/A, Hot Wire
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As the temperature of a conductor increases what happens to resistivity?
Increases
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What are the conditions for minimum resistANCE for a wire?
- small L, Large A
- R=ρL/A, Cold Wire
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What is Ω?
Omega, Unit for Ohms
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What is I/R equal to?
Voltage
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What is I2R equal to?
Power = Current2 times Resistance
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What is IV equal to?
Power = Current times Voltage
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What is V2/R equal to?
Power = Voltage2 / Resistance (Joules, Watts / Second)
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What is a kilowatt hour equal to?
3.6 x 106 J
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