Answer / thowsif_emerson

A potentiometer is a three-terminal resistor with a sliding
contact that forms an adjustable voltage divider.[1] If
only two terminals are used (one side and the wiper), it
acts as a variable resistor or Rheostat. Potentiometers are
commonly used to control electrical devices such as a
volume control of a radio.


For more information log on to:-
http://en.wikipedia.org/wiki/Potentiometer

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