Physics, 13.10.2019 18:20 shiyaharper

How are n type semiconductors and p type semiconductors alike. how are they different

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N-type semiconductor materials have been with elements which have spare electrons in their outer shells. This gives N-type silicon free electrons (which are negatively charged partials) which can move about at will - with the potential to create current.

P-type semiconductor materials have been in the opposite way, with elements that have too few electrons in their outer shells. Therefore the opposite of electrons - holes - are free to move about within the material - with the potential to create current.

You can think of it like positive and negative poles of a magnet.

When you place a piece of N-type silicon next to a piece of P-type silicon, they form a diode. The excess electrons in the N-type are attracted to the excess holes in the P-type, forming what is known as a P-N junction. If you then put a potential difference (voltage) across the junction such that the P-type is sufficiently higher potential than the N-type, electrons will be able to jump across the boarder from the N-type to the P-type, creating current in the opposite direction.
If you apply the potential difference in the opposite direction, such that the N-type is at a higher potential than the P-type, there is no flow of electrons from the P to the N-type because the N-type already has too many. There is no current flow.

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a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

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the results is a decrease in air temperature with an increase of altitude.

explanation:

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How are n type semiconductors and p type semiconductors alike. how are they different...

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