# What is a complete circuit KS2?

Wires must be connected to both the positive and negative ends of the power source for a circuit to be complete. A battery, a light bulb, and wires may be used to create a basic circuit. The switch must be in the ON position for the circuit to be complete.

If the switch is not in the correct position, it cannot send a signal through the wire to another device or element. Even if the wire gets damaged, it does not need to be replaced because all that needs to be done is turn the switch back on and the other device or element will work again.

A complete circuit is needed to make something work. For example, you would need a complete circuit to use a lamp as night-time lighting because there is no way for electricity to flow into a lamp from a single wire. This means that you would need two separate wires connecting your lamp to an electrical source.

In conclusion, a complete circuit is when all the parts are connected such that they can send a signal through a path IFF one of them receives a signal from another part of the circuit. The term complete refers to the fact that no part of the circuit is missing.

## What is a simple circuit made up of?

A basic electric circuit can be made up of a battery (or other energy source), a light bulb (or other energy-consuming device), and conducting wires connecting the two terminals of the battery to the two ends of the light bulb. A simple circuit does not contain any switches or other components that can change the state of the circuit.

In a real circuit, all the parts would be combined in a complete device, but for simplicity's sake we will keep them separate. A simple circuit is very easy to understand because everything it needs comes pre-installed on most appliances. A simple circuit also has very low resistance between its two terminals, which means less power is lost as electricity flows through it.

In conclusion, a simple circuit is one that uses few components, is easy to understand, and has low resistance between its terminals.

## Which of the following is needed to build a simple circuit?

A power supply, two insulated wires, a light bulb, and a light bulb holder are all required to construct a basic circuit. Any sort of battery or battery pack can be used as a power source. The remaining items are available at your local hardware shop. Simple circuits usually use a single wire for both voltage division and ground return. A second insulated wire is required only if the original circuit is going to be reused or extended.

The first electrical circuit was a simple one consisting of two wires: One served as a +voltage source and the other as a ground (or -) voltage source. If the two wires were connected together, then any device plugged into this circuit would receive power; but if not, then nothing would. The first application of electricity came when Michael Faraday invented the electric generator in 1831. This device uses a spinning metal disk called a "pole" to generate small electric currents which can then be used for lighting and other purposes. In 1872, Thomas Edison improved upon this design by adding a semiconductor component called a "diode" which allows current to pass in only one direction through a circuit.

Edison's invention became the standard for homes across America. It has been estimated that about 80% of homes in the United States were wired with electricity by 1920.

##### Patrick Bennett

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