10.1 Circuits and current electricity | Energy transfer in electrical systems | Siyavula
1: A lightbulb with the switch open and closed [2] 1 above shows an... | Download Scientific Diagram
File:SPST-Switch closed.png - Wikimedia Commons
Watson
Switch An opening in a circuit which can be closed to allow current to flow. Switches have only two states – on or off. | Door alarms, Circuit, Building a door
Electrical Symbols | Circuit Symbols For Kids | DK Find Out
Switches | Ultimate Electronics Book
switches - "Normally closed" switch: does it use more power than a "Normally open" for a low-power battery-powered ATtiny project? - Electrical Engineering Stack Exchange