What is the total resistance of a closed switch?

In an electrical circuit, a closed switch essentially acts as a conductor with negligible resistance. When a switch is closed, it completes the circuit, allowing current to flow freely without significant hindrance. The resistance offered by an ideal closed switch is considered to be zero ohms, meaning there is no opposition to the flow of electric current.

In real-world applications, while there may be slight imperfections leading to minimal resistance in actual closed switches, they are generally designed to function as low-resistance pathways to maximize efficiency. Therefore, understanding that a closed switch effectively has zero ohms of resistance is crucial for analyzing and designing electrical circuits. This fundamental concept aids technicians in troubleshooting and determining the behavior of electronic systems.