Final answer:
A blown fuse, circuit breaker can be considered 'blown' when it opens or breaks the circuit, interrupting the flow of electric current. This typically occurs when the current passing through the circuit is higher than the rated current for the breaker or fuse.
Step-by-step explanation:
A circuit breaker or fuse can be considered 'blown' when it opens or breaks the circuit, interrupting the flow of electric current. This typically occurs when the current passing through the circuit is higher than the rated current for the breaker or fuse.
In the case of a fuse, a metal strip with a low melting point inside the fuse will melt to break the circuit. For a circuit breaker, it will trip and move to the 'off' position.
When this happens, you may notice:
- No power in the affected area or appliance
- Noise, such as a popping sound or a tripped breaker clicking back into place
- A visual indication, such as a fuse wire appearing severed or a tripped breaker switch visibly moved to the 'off' position