Final answer:
Magnetic door switches, glass breakers, burglar alarm screens, and photoelectric beams are types of electrical safety systems and devices used to prevent thermal and shock hazards.
Step-by-step explanation:
Magnetic door switches, glass breakers, burglar alarm screens, and photoelectric beams are types of electrical safety systems and devices used to prevent thermal and shock hazards.
These devices function by interrupting excessive currents to prevent thermal hazards and by utilizing live/hot, neutral, and earth/ground wires to guard against thermal and shock hazards.
Additionally, some of these devices use induction to perform their basic function.