Does Rheostat Change Current?

Rheostat is a type of variable resistor, whose resistance can be changed so as to change the amount of current flowing through a circuit.

Does rheostat increase or decrease current?

So, a rheostat can increase as well as decrease the current. Hence, the correct option is C.

What does a rheostat do in a circuit?

Rheostat, adjustable resistor used in applications that require the adjustment of current or the varying of resistance in an electric circuit. The rheostat can adjust generator characteristics, dim lights, and start or control the speed of motors.