What is a common use of a variable resistor?

What is a common use of a variable resistor?

• A. To store electrical charge
• B. To measure voltage levels
• C. To adjust current levels in a circuit
• D. To convert AC to DC

Answer: (C)

A variable resistor, commonly known as a rheostat or potentiometer, is specifically designed to adjust current levels in an electrical circuit. By changing its resistance, it allows users to control the flow of electrical current. This feature is crucial in various applications, such as dimming lights, adjusting sound levels in audio equipment, or tuning circuits in electronic devices. The ability to modify resistance dynamically makes the variable resistor an essential component in ensuring that circuits function within desired parameters, thereby enhancing user experience and safety in electrical systems.

A variable resistor, commonly known as a rheostat or potentiometer, is specifically designed to adjust current levels in an electrical circuit. By changing its resistance, it allows users to control the flow of electrical current. This feature is crucial in various applications, such as dimming lights, adjusting sound levels in audio equipment, or tuning circuits in electronic devices.

The ability to modify resistance dynamically makes the variable resistor an essential component in ensuring that circuits function within desired parameters, thereby enhancing user experience and safety in electrical systems.