For what are variable resistors used?


Quick Answer

Variable resistors are used for calibrating the electrical resistance of a device that directly controls a certain parameter such as the volume or tone settings on radios. The two forms of variable resistors, also called potentiometers, are adjustable and preset.

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Full Answer

Resistors are components that regulate or impede the flow of electrical conductance. Categorized into three groups, resistors can be fixed resistors, variable resistors or special resistors. Variable resistors are further divided into two types according to how they are operated. Adjustable variable resistors can be constantly changed by a user, while preset variable resistors are configured during manufacture and cannot be manually adjusted. Adjustable resistors typically come in larger sizes compared to preset resistors.

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