What role do circuit breakers play in AC systems?

What role do circuit breakers play in AC systems?

• A. Enhance power factor
• B. Protect circuits from overloads
• C. Increase voltage levels
• D. Regulate temperature

Answer: (B)

Circuit breakers are critical components in alternating current (AC) systems primarily for their role in protecting circuits from overloads. In the event of excessive current flow due to faults, short circuits, or other issues, circuit breakers will automatically interrupt the electrical supply to prevent damage to the wiring and connected devices. This action avoids overheating and potential fire hazards, ensuring the safety and integrity of the electrical system. While some options might mention enhanced performance or functionality characteristics, such as power factor, voltage levels, or temperature regulation, these do not accurately describe the primary function of a circuit breaker. The key feature of a circuit breaker is its ability to detect an abnormal condition and to break the circuit, thereby safeguarding the entire system from potential failures.

Circuit breakers are critical components in alternating current (AC) systems primarily for their role in protecting circuits from overloads. In the event of excessive current flow due to faults, short circuits, or other issues, circuit breakers will automatically interrupt the electrical supply to prevent damage to the wiring and connected devices. This action avoids overheating and potential fire hazards, ensuring the safety and integrity of the electrical system.

While some options might mention enhanced performance or functionality characteristics, such as power factor, voltage levels, or temperature regulation, these do not accurately describe the primary function of a circuit breaker. The key feature of a circuit breaker is its ability to detect an abnormal condition and to break the circuit, thereby safeguarding the entire system from potential failures.