Which device is commonly used to interrupt the flow of electricity in case of danger?

The device most commonly used to interrupt the flow of electricity in case of danger is a breaker. Circuit breakers are designed to automatically shut off electrical circuits when they detect an overload or a short circuit, thereby preventing potential hazards such as fires or electrical shocks. They provide protection by interrupting current flow, allowing the system to reset once the fault is cleared. This capability makes breakers essential safety devices in residential and commercial electrical systems.

Switches, while capable of interrupting electrical flow, are typically used for manual control and do not provide automatic protection against overloads. Fuses serve a similar protective purpose but must be replaced after they blow, whereas breakers can be reset. A receptacle is not a protective device; instead, it serves merely as a point for connecting electrical devices to a circuit. Therefore, the breaker stands out as the most effective and commonly employed choice for automatically interrupting electrical flow in dangerous situations.