Which is a characteristic of a circuit breaker?

A circuit breaker is designed to interrupt the flow of electricity during an overload or short circuit condition, and one of its defining characteristics is its ability to be reset after tripping. This means that after the breaker has interrupted the circuit to protect the system, the user can manually or automatically reset it to restore power without needing to replace it. This is a significant advantage over fuses, which must be replaced once they have blown.

Circuit breakers are versatile and can be used in both AC and DC applications, making them more flexible than the option that states they only work on AC circuits. Additionally, circuit breakers come in various types, allowing them to handle a wide range of voltage levels. Thus, the notion that they can only handle low voltage is not accurate, as many circuit breakers are specifically designed for high voltage applications as well.