Correct Answer - Option 4 : Make or break
A switch is used to make or break the electric circuit.
Different switches used for electrical circuits are
Single pole, one-way switch:
- This is a two-terminal device, capable of making and breaking a single circuit only.
- A knob is provided to make or break the circuit. It is used for controlling light or fan or 6 amps socket.
Single pole, two-way switch:
- This is a three-terminal device capable of making or breaking two connections from a single position.
- These switches are used in staircase lighting where one lamp is controlled from two different places.
Intermediate switch:
- This is a four-terminal device capable of making or breaking two connections from two positions.
- This switch is used along with 2-way switches to control a lamp from three or more positions.
Bell-push or push-button switch:
This is a two-terminal device having a spring-loaded button. When pushed it `makes' the circuit temporarily and attains `break' position when released.
Pull or ceiling switch (Pendant switch):
- This switch is normally a two-terminal device functioning as a one-way switch to make or break a circuit.
- This switch is mounted on ceilings. As the user could operate the switch from a distance through the insulated cord, this could be used safely for operating water heaters in bathrooms or fan or lights in bedrooms.
