Circuit breakers are devices that do what?

• A. Interrupt electrical flow during faults.
• B. Increase current during overload.
• C. Convert AC to DC.
• D. Store electrical energy.

Answer: (A)

Protecting electrical systems by interrupting current during faults. A circuit breaker senses abnormal conditions such as overloads or short circuits and quickly opens its contacts to break the circuit, stopping the flow of electricity to prevent damage, overheating, or fires. After the fault is cleared, it can be reset to restore power. It does not purposefully increase current, convert AC to DC, or store energy—those are functions of other devices.