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The amount of electrons that pass a given point in one second. Current = I Unit = Ampere (amp) 1 ampere = 6,250,000,000,000,000,000 (6.25 x ) electrons passing a point in 1 second 1 amp = 1,000 mA
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Electrical circuit: a closed loop where charged particles flow
Electrical current: a flow of charged particles (e-)
Direct current (DC): a flow of charged particles in one direction only
Alternating current (AC): a flow of charged particles in either direction (1st in one direction, then the other)
The amount of electrons that pass a given point in one second.
Current = I Unit = Ampere (amp) 1 ampere = 6,250,000,000,000,000,000
(6.25 x 1018) electrons passing a point in 1 second
1 amp = 1,000 mA
The electrical pressure or force Voltage = V Unit = volts Sometimes referred to as electric
potential difference Compare to water in a pipe: water = e-
pressure = voltage
The work performed by an electrical current
Power = P Unit = watt
The degree to which a conductor hinders the flow of charged particles
Resistance = Ohm Unit = Ω No conductor is perfect. Some current
is lost (usually to heat)
Ohm's law = the current through a conductor between two points is directly proportional to the voltage across the two points.
Formulas:P = I x V P = energy/timeV = I x RI = V / RR = V / I
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