Why do you need insulators?

Answer 1

An insulator prevents electricity from flowing because it has an extremely high resistance.

An insulator must never be allowed to get any water on it as the water will conduct electricity!

Because they don't allow electricity to pass through them, insulators are hardly ever used "in" circuits as such.

Most times insulators have to be used to stop electricity from flowing:

• where it is not wanted - for instance between two wires in a cable

  or

• where or it would be dangerous to allow electricity to flow.

  For instance an electrical appliance such as an oven, water heater or clothes dryer has lots of metal parts inside it and someone could easily get killed (electrocuted) if the current from one of the "live" or "hot" wires inside it was allowed to get to its outside metal casing.

So two of the most common uses of insulators are as:

• jackets or "coatings" for wires

  and for

• "bodies" or "cases" of things such as electric plugs, televisions, etc.

Another very important use of insulators is to make "circuit boards" on which electrical components can be mounted.

By using an insulator for a circuit board means that - as long as it always stays dry - there will usually be no risk of the circuit board shorting out the components by conducting electricity between their terminals.
Think of your sink. The outside of the pipe is your insulator. The inside of your pipe conducts the water. You turn on the water. If you did not have the outside of the pipe to insulate the water, it would go all over the place. Instead, it directs your water into your sink. Then when you are through with it, it goes down a drain. That has another pipe. If that pipe was not there, it would go all over the floor and you would have a mess. Electricity works basically the same way.

A circuit uses conductors to take the electricity where you want it to go. It uses insulators to keep the electricity in the conductors just like pipes keep water inside them. They take the electricity to where it will do the work and then back to where it came from. It works like your Plumbing system.

Answer 2

So they don't go too hot, as the insulators they're given are of a special type: the insulators take heat out of the electronics to stop getting hot, then store the heat. Once the electronic device is turned off, it will begin cooling off

Insulators do not conduct electrons very well. And as a consequence it isolate electronics part from other parts. it is usually extensively used on haetsink to isolate the part from the metal

Another reason is because its also helps protect the human body from coming in contact with a high voltage that's running through the wires.

Answer 3

they allow safe paths for current,ie.- they isolate the conductor from building,people,etc.

Answer 4

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