When an electrical switch is closed, will electricity flow through it?

When an electrical switch is closed, it completes the circuit, allowing electricity to flow through it. The function of a switch is to either connect or disconnect a circuit; when closed, the path for electric current is fully established. This straightforward action enables the current to travel unimpeded through the switch and into the connected devices or wiring, hence allowing their operation.

The correct choice reflects this principle of basic electrical circuit functionality. A closed switch is essentially a bridge in the circuit that facilitates the flow of electricity, making it essential for the activation of any electrical device connected in that circuit. Other options suggesting that electricity will not flow, that it may only sometimes flow, or that it depends on the current type misunderstand the fundamental operation of a standard on/off switch. For a typical switch in an electrical circuit, its closed position is specifically designed to permit current flow, underlining the accuracy of the correct answer.