# Your question: What is the function of a key or switch in an electric circuit?

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The function of a key or a switch is to put on or off current in a circuit.

## What is the function of a key switch in an electric circuit?

The circuit is called ‘closed’ when the current flows in the circuit, and when the current does not flow, it is called an ‘open circuit‘. The switch or key helps to make or break the circuit, i.e. switches on or switches off the current.

## What is a key in an electric circuit?

A key is present in a electric circuit because, it acts like a switch to pass and stop the flow of current. If a switch is not present then the battery which we use will get used up quickly. It helps us to conserve energy. It also breaks the current when we need it to. It is also known as a plug key.

## What is switch or key?

switch is device that controls the flow of current in circuits. It is like a device that completes a circuit. … While a key is a mechanical component that can be used to act as a switch.

## What is the function of main switch?

The main switch can be cut off by a human or a computerized system to control the flow of power in the building. The main switch, also referred to as a distribution board, divides the feed of electrical power to a building into subsidiary circuits and provides a protective fuse for each circuit.

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## What is the function of open circuit?

Definition of opencircuit voltage. The box is any two-terminal device, such as a battery or solar cell. The two terminals are not connected to anything (an “open circuit“), so no current can flow into or out of either terminal.

## Can a circuit work without a switch?

No, because the current can still flow through the wires even without a switch. …

## Why electricity is not allowed in open circuit?

An open circuit has an extremely high resistance ( theoretically infinite resistance) between the two electrical points of an electrical system. This means there is effectively no path readily available for the current to flow berween the two points in normal condition. Hence, no current flows as a consequence.

## Where the key or switch be placed in an electric circuit?

The key or Switch can be placed anywhere in the electric circuit.

## Is switch and key the same?

A Switch helps in making or breaking of the circuit while, a plug key helps in keeping a circuit open or closed for a longer duration.

## How does a key switch work?

Once the ignition switch is prompted by key or the push of a button, it activates the voltage from the battery to the ignition coil to produce the engine spark. The engine spark from the coil or coils is directed to the spark plugs to ignite the fuel to make the vehicle run.