Mathematically this is: Physically, a normally open (NO) switch and a normally closed ... of the switching algebra is to use math to reduce circuits, represented by expressions, to their simplest ...

Energy can flow and the lamp lights up. When the switch is tuned off, the circuit is open so the electrical energy stops flowing. Circuit symbols are really useful when designing the electrical ...

The position of switches in parallel circuit is important. If the switch is open, both lamps are off. When the switch is closed, both lamps are on. Figure caption, In a parallel circuit ...