Question

Is air a conductor or an insulator? Explain​

Answer 1

Answer:

Air (like in the atmosphere) is actually an excellent electrical insulator. This means that electricity can be sent through a conductor and it won't jump through the air.

Explanation:

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Answer 2

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Short Answer:-

Air (like in the atmosphere) is actually an excellent electrical insulator. This means that electricity can be sent through a conductor and it won't jump through the air.

Long Answer:-

Still air is just about the best insulator there is. At the molecular level, heat transfer is easier when atoms are packed closely together. So the actual point of most insulations is to get rid of as much solid material and trap still air inside little pockets.

Most closed cell foams trap different gases than the air we breathe, but they still work on the same principle, replace as much solid material with gas as possible.

But air is also a fluid, and as such large volumes of air are great at convecting heat. If you have a large air current, it will transfer heat from hot to cold pretty effectively. Once you have an air cavity more than 1/2 an inch wide, the ability for the air to circulate within the cavity starts to rise, and air becomes less effective as an insulator.

In terms of using just air as an insulation, almost all of the insulation value of a single pane window is based on the air film on the interior of that window, but that only works if the film can be maintained and that requires calm air.

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