Question

The purpose of a rheostat is

• A. to increase the magnitude of the current only.
• B. Decrease the magnitude of current only
• C. Increase or decrease the magnitude of the current
• D. None of these

Answer 1

The correct option is C

Increase or decrease the magnitude of the current

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

Hence option (C) is correct.