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Resistor
Resistor, electrical component that opposes the flow of either direct or alternating current, employed to protect,…
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Electric heater
Electric heater, device for heating rooms that converts electric current to heat by means of resistors that emit radiant energy. Resistors may…
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Lamp
Lamp, a device for producing illumination, consisting originally of a vessel containing a wick soaked in combustible material,…
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Electric current
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…
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Electricity
Electricity, phenomenon associated with stationary or moving electric charges. Electric charge is a fundamental property of matter and…
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Control theory
Control theory, field of applied mathematics that is relevant to the control of certain physical processes and systems. Although…
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Resistance
Resistance, in electricity, property of an electric circuit or part of a circuit that transforms electric energy into heat energy…
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Feedback control
Relationship of program control and feedback control in an automated system. Machines that cannot function…
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Loom
Loom, machine for weaving cloth. The earliest looms date from the 5th millennium BC and consisted of bars or…
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Automation
Automation, the application of machines to tasks once performed by human beings or, increasingly, to…