. As indicated by its name, a , is a type of resistor which value is adjustable/change. Variable resistors have two basic components. The material that provides the variable resistance is called the element. and the movable component, which is used to set the resistance, is called the wiper, or brush.

The following used to indicate a in a . variable resistor electronic symbolThere are two general ways in which variable resistors are used. One is the which value is easily changed, like the volume adjustment of Radio. The other is semi-fixed resistor that is not meant to be adjusted by anyone but a technician. Variable resistors may be used as a rheostat with two connections (the wiper and just one end of the track) or as a potentiometer with all three connections in use.

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