Question

What is the use of a plug key in the circuit?

Answer 1

When the plug key is pushed, it acts as a switch, allowing or interrupting current flow. It can be either an open or a closed switch.

Explanation:

1. A plug key is an electrical component that acts as a switch.
2. To turn on the circuit, a little metallic key is put into a metallic base, and the circuit is shut off if it is detached from its base.
3. No current flows through the circuit when the plug key is open, and current flows through the circuit when the plug key is closed.
4. The equipment that supplies energy is known as sources, such as lamps, electric engines, and so on.
5. The devices that use power are known as 'loads.'
6. When necessary, switches are utilized to turn on and off the loads.
7. As a result, electrical circuits are formed by connecting the source, the load, and the switch.
8. When current passes through the circuit, it is termed a 'closed circuit,' and when it does not, it is called an 'open circuit.'
9. The switch or key assists in making or breaking the circuit, i.e. turning on or off the current.