What type of circuit is represented by a switch that is normally open?

A switch that is normally open creates an incomplete circuit. In an electrical circuit, an open switch means there is a break in the conductive path, preventing current from flowing. This is characteristic of a circuit where the connections are not fully established, thus rendering the circuit inactive.

When the switch is in the open position, electricity cannot travel through the circuit, meaning it's not completed. Once the switch is closed, it allows current to flow and completes the circuit, activating any connected devices. This principle is foundational in understanding how switches control the flow of electricity within various applications.