The purpose of a rheostat is: (a) Increase the magnitude of current only (b) Decrease the magnitude of current only (c) Increase or decrease the magnitude of current (d) None of these
The correct option is C Increase or decrease the magnitude of the current Option C. Rheostat 1. It is a variable resistor that is used to control the current. This is achieved by manually increasing or decreasing the resistance. 2. It works by changing the length of the associated resistor wire in the circuit. 3, Rheostat reduces the electric current flow to a certain level
