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electric charge
property of fundamental particles that determines how they react to electric and magnetic fields
electric charge unit
Cuolombs (C)
voltage
the amount of work required to move an electric charge from some reference point to another point in space
work / charge
current
rate at which electrical charges move through an area
charge / time
resistance
opposition to flow of current
(resistivity x length) / area
what determines how much resistance a wire has?
material of wire
length of wire
cross-sectional area
what type of wire has most resistance?
long, thick, small cross-sectional area wires
5 color bands
band 1: first digit
band 2: second digit
band 3: third digit
band 4: multiplier (number of zeros after third digit)
band 5: tolerance
Ohm’s Law
V=IR
Battery life
Battery Life = Capacity / Discharge rate
What is power?
energy / time