Which of the following is one function of a resistor in a circuit?

• A. To limit the amount of current flowing through the circuit
• B. To convert electrical energy directly into mechanical energy
• C. To store electrical charge for later use
• D. To increase the voltage supplied by the battery

Answer: (A)

Verified step by step guidance

1. Understand the role of a resistor in an electrical circuit. A resistor is a component designed to oppose or limit the flow of electric current.
2. Recall that resistors convert electrical energy into heat, thereby controlling the current without storing energy or increasing voltage.
3. Eliminate options that do not match the function of a resistor: it does not convert electrical energy into mechanical energy, nor does it store electrical charge like a capacitor, nor does it increase voltage like a power source.
4. Recognize that the primary function of a resistor is to limit the amount of current flowing through the circuit by providing resistance.
5. Conclude that the correct function of a resistor is to limit current, which helps protect other components and control circuit behavior.