A blown fuse affects the flow of current in what way?

A blown fuse acts as a protective device in an electrical circuit, and its primary function is to interrupt or stop the flow of current when it exceeds a safe level. When a fuse blows, it effectively breaks the circuit, preventing electricity from flowing past that point. This interruption protects electrical components from potential damage due to excessive current, which could cause overheating or failure. Therefore, the correct answer reflects that a blown fuse stops current flow entirely in the circuit.