# How does a rheostat work?

A rheostat is a variable resistor. The way it works is that there is a terminal at one end of the resistor. The other terminal is attached to a wiper that moves along the resistor. Current flows between the two terminals. If the wiper is moved across the resistor, the resistance in the path of the current will change. The resistor itself often consists of high resistance wire wound around an insulator. As the wiper contact moves from wire to wire of the winding, the resistance changes.
Q&A Related to "How does a rheostat work?"
 George Ohm was a German mathematician who performed notable, experimental work with electricity in the first half of the 1800s. He discovered and formulated what is now referred to http://www.ehow.com/about_5610830_rheostat_.html?r...
 A rheostat is a resistor with variable resistance.There are many type of rheostat,involved of a rotary-type rheostat and a sliding rheostst.I dunn know much about the rotary-type http://wiki.answers.com/Q/What+is+the+that+is+used...
 ( ′rē·ə′stat ) (electricity) A resistor constructed so that its resistance value may be changed without interrupting the circuit to which it is connected http://www.answers.com/topic/rheostat-1
 A rheostat is an electrical device used to control the resistance of a circuit and to control the http://www.chacha.com/question/what-is-a-rheostat