Question

How a switch could be used to work a burgular alarm

Answer 1

closed circuit are normally a better choice than open circuits because an intruder can deactivate the open circuit by simply cutting the connected wires.......a battery powering a circuit.A spring-driven metal switch built into a door frame.A magnet embedded in the door,lined up with the switch.

Answer 2

I think u should connect the circuit of the switch to an LDR and a BUZZER and a RESISTANCE.AND focus an led to the LDR.