How does a light controlled by two different switches work?
Justin asked:
In my house, there is a dining room with two different light switches that control the same light. I always thought that a light switch works by opening and closing the circuit controlling the flow of electricity to the light.
In my house, there is a dining room with two different light switches that control the same light. I always thought that a light switch works by opening and closing the circuit controlling the flow of electricity to the light.
However, if the light can be turned on and off by both switches then how does the circuit really work? For example, if I walk into the room with both switches set on off and the light is off and turn one of the switches on, turning the light on then walk over to the other switch turning it to on as well. Instead of giving the light more power, it turns the light off. This puzzles me because it shouldn’t be opening the circuit that the other switch is physically closed on.