What happens when the current in a circuit is too high?

When the current in a circuit exceeds the designed limits, it can lead to the circuit breaking automatically, often through a mechanism such as a fuse, circuit breaker, or overload protection device. This safety feature is critical in preventing overheating, potential damage to electrical components, and fire hazards. The automatic interruption of the circuit helps safeguard both the equipment and individuals working near the circuit by immediately cutting off the electrical flow when unsafe levels are detected.

In contrast, the options suggesting that electricity flows freely without interruption or that the device simply stops working do not account for the protective measures in place that respond to excessive current. Additionally, while it's true that workers may need to reset the circuit manually in some situations after it shuts down due to an overload, this is not the immediate action that takes place when currently exceeds safe levels; the breaking of the circuit happens first to ensure safety.