Potentiometer
Voltmeter Voltmeter, instrument that measures voltages of either direct or alternating electric current on…
Rheostat
Rheostat, adjustable resistor used in applications that require the adjustment of current or the varying of resistance in…
Alternating current
Alternating current, abbreviation AC, flow of electric charge that periodically reverses. It starts, say, from…
Resistor
Resistor, electrical component that opposes the flow of either direct or alternating current,…
Electric heater
Electric heater, device for heating rooms that converts electric current to heat by means of resistors that emit radiant…
Lamp
Lamp, a device for producing illumination, consisting originally of a vessel containing a wick soaked…
Electric current
Electric current, any movement of electric charge carriers, such as subatomic charged particles (e.g., electrons having negative charge, protons having…
Electricity
Electricity, phenomenon associated with stationary or moving electric charges. Electric charge is a fundamental property…
Control theory
Control theory, field of applied mathematics that is relevant to the control of certain physical processes…
Resistance
Resistance, in electricity, property of an electric circuit or part of a circuit that transforms…
