Q. 124.4( 14 Votes )

What is Rheostat?

Answer :

it is a device which is used as a current controller in the circuit by changing its resistance. The Rheostat consists of wounds of nichrome wire in which each wound has a specific area and are connected in series with each other as we slide over this wounded wire the resistance of the rheostat changes.
A picture of rheostat is attached here:

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