Electric Switch
Key Notes :
Definition of an Electric Switch:
- An electric switch is a device used to open or close an electrical circuit.
- It controls the flow of electric current.
Purpose of an Electric Switch:
- It helps to turn on or off electrical appliances, such as lights, fans, or machines.
Types of Switches:
- Manual Switches: Operated by hand (e.g., household switches).
- Automatic Switches: Operate automatically based on conditions (e.g., sensors, thermostats).
Parts of an Electric Switch:
- Switch plate or body: The outer casing.
- Toggle or lever: The part moved to turn the circuit on or off.
- Contacts: Conductors inside the switch that make or break the connection.
How a Switch Works:
- When the switch is on, it completes the circuit, allowing electricity to flow.
- When the switch is off, it breaks the circuit, stopping the flow of electricity.
Symbols Used in Circuit Diagrams:
- A switch is represented by a simple open line (off) or a closed line (on) in circuit diagrams.
Examples of Electric Switches :
- Push-button switch: Used in doorbells.
- Two-way switch: Controls one device from two different locations.
- Rotary switch: Used in appliances like fans.
Importance of Switches:
- Safety: They prevent electrical hazards by controlling the flow of current.
- Convenience: Allow easy control of devices.
Real-Life Applications:
- Used in homes, schools, industries, and vehicles for various electrical devices.
Precautions While Using Switches:
- Always ensure hands are dry to avoid electric shocks.
- Do not tamper with faulty switches; get them repaired by a professional.
Let’s practice!
