What may result from an overloaded circuit?

An overloaded circuit occurs when the demand for electrical current exceeds what the circuit is designed to handle. This excessive current can generate heat, which can lead to various safety issues. One of the primary safety mechanisms in electrical systems is the circuit breaker or fuse.

When a circuit becomes overloaded, the increased current flow will cause the circuit breaker to trip or the fuse to blow. This action interrupts the flow of electricity to prevent overheating and potential fire hazards, protecting both the circuit and connected devices. Therefore, the response of tripping circuit breakers or blowing fuses is a direct consequence of an overload situation, effectively serving as a safeguard against serious hazards.

In contrast, the other options suggest positive outcomes that do not align with the realities of an overloaded circuit. For example, an overloaded circuit does not increase equipment lifespan nor enhance circuit efficiency; rather, it can cause premature equipment failure and inefficiencies. Similarly, an uninterrupted power supply would not be feasible in an overloaded scenario, as the safety mechanisms would actively disengage power to protect the system.