What is Rheostat ? ( class 10 )
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Rheostat is an electric device used as a variable resistance, like the regulator of the fan. It is used to change the electric resistance in the electric circuit. UsuallyRheostat consists of a coil of wire with a terminal at one end and a sliding contact that moves along the coil to tap off the current.
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Answered by
37
an electrical instrument used to control a current by varking the resistance
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