Which component typically has a resistance of 0 ohms when functioning properly?

A fuse is designed to provide a protective function in an electrical circuit by breaking the connection when excess current flows through it. When a fuse is functioning properly, it presents a very low resistance, often considered 0 ohms. This allows current to flow freely until the rated limit is surpassed. If the current does exceed this limit, the fuse will "blow," thus stopping the flow of electricity and preventing damage to the circuit.

In contrast, a resistor is designed to limit current flow and will always have a specified resistance value greater than zero ohms, depending on its design and application. A capacitor stores electrical energy and presents a reactive impedance rather than purely resistive behavior. An inductor also produces magnetic fields in response to current and typically has an impedance influenced by the frequency of the current. Thus, it too will not have a resistance of 0 ohms in practical applications.