What is a Rheostat?

Описание к видео What is a Rheostat?

Rheostat, adjustable resistor used in applications that require the adjustment of current or the varying of resistance in an electric circuit.

The rheostat can adjust generator characteristics, dim lights, and start or control the speed of motors. Its resistance element can be a metal wire or ribbon, carbon, or a conducting liquid, depending on the application.

For average currents, the metallic type is most common; for very small currents, the carbon type is used; and for large currents, the electrolytic type, in which electrodes are placed in a conducting fluid, is most suitable.

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