Alternating current, abbreviation AC, flow of electric charge that periodically reverses. It starts, say, from zero, grows to…

Resistor, electrical component that opposes the flow of either direct or alternating current, employed to protect,…

Electric heater, device for heating rooms that converts electric current to heat by means of resistors that emit radiant energy. Resistors may…

Lamp, a device for producing illumination, consisting originally of a vessel containing a wick soaked in combustible material,…

Electric current, any movement of electric charge carriers, such as subatomic charged particles (e.g., electrons having negative charge, protons having positive charge), ions (atoms that have…

Electricity, phenomenon associated with stationary or moving electric charges. Electric charge is a fundamental property of matter and…

Control theory, field of applied mathematics that is relevant to the control of certain physical processes and systems. Although…

Resistance, in electricity, property of an electric circuit or part of a circuit that transforms electric energy into heat energy…

Relationship of program control and feedback control in an automated system. Machines that cannot function…

Loom, machine for weaving cloth. The earliest looms date from the 5th millennium BC and consisted of bars or…