
What is grounding?
Provide pathway for extra electrons to leave

What does an Ammeter measure?
I current (amps)

What are the component units of Amperes?
Coulombs / Sec


Why does the current stop increasing?
Resistance in the circuit

What is the symbol for resistivity?
ρ Rho

What is the symbol for ResistANCE?
R

What is the ResistANCE for a wire?
ρL/A

When do you get maximum resistANCE for a wire?
 Large L, Small A
 R=ρL/A, Hot Wire

As the temperature of a conductor increases what happens to resistivity?
Increases

What are the conditions for minimum resistANCE for a wire?
 small L, Large A
 R=ρL/A, Cold Wire

What is Ω?
Omega, Unit for Ohms



What is I/R equal to?
Voltage

What is I^{2}R equal to?
Power = Current^{2} times Resistance

What is IV equal to?
Power = Current times Voltage

What is V^{2}/R equal to?
Power = Voltage^{2} / Resistance (Joules, Watts / Second)

What is a kilowatt hour equal to?
3.6 x 10^{6} J

