A resistor is a passive two-terminal electrical component that implements electrical resistance
as a circuit element. In electronic circuits, resistors are used to
reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses. High-power resistors that can dissipate many watts of electrical power as heat may be used as part of motor controls, in power distribution systems, or as test loads for generators.
Fixed resistors have resistances that only change slightly with
temperature, time or operating voltage. Variable resistors can be used
to adjust circuit elements (such as a volume control or a lamp dimmer),
or as sensing devices for heat, light, humidity, force, or chemical
activity.Resistors are common elements of electrical networks and electronic circuits and are ubiquitous in electronic equipment. Practical resistors as discrete components can be composed of various compounds and forms. Resistors are also implemented within
