Identify the device used to change the resistance in an electric circuit.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. Rheostat.
The device used to change the resistance in an electric circuit is a rheostat. A rheostat is an adjustable resistor that allows for the control of current flow by varying the resistance in the circuit. It is commonly used in applications where it is necessary to adjust the current or voltage levels, such as in dimming lights or controlling motor speeds. By changing the resistance, the rheostat helps in regulating the performance of electrical devices and circuits.