Electronic control systems – electronic quantities - BBC Bitesize

Current – the flow of electrons. The number of electrons passing a given point in one second. Current is measured in Amps and milliamps (A). Voltage – the force that makes electrons flow.Voltage (v) is measured in Volts and millivolts (V). Resistance - When a material resists the flow of electrons.Resistance is measured in ohms, kilo-ohms, mega-ohms (Ω).