Resistorsearch for term

An ideal resistor is a component with an electrical
that remains constant regardless of the applied voltage or current flowing through the device.
While "real world" resistors cannot attain this perfect goal, they are designed to present little variation in electrical
resistance when subjected to changing temperature and other environmental
Resistors may be fixed or variable. Variable resistors are also called potentiometers or rheostats and allow the resistance of the device to be altered by turning a shaft or sliding a control.

See also: Ampere, Electrical resistance, Volt