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variable resistor. A rheostat. variable resistor - Computer Definition. An electronic component that is used to vary the amount of current that flows through a circuit. It works by sliding a wiper terminal across a resistive material, typically a thin film or chunk of carbon or a resistive wire made of nickel chromium or tungsten alloys.
4/18/2012 3:20:33 PM | by Anonymous. Resistors are electrical components that are used in electrical circuits to manipulate current flow. They are individual components and are measured in ohms that range from less than 1 ohm to well over millions of ohms.