plz can anyone explain in detail what is p-n junction diode
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Answer:
A p-n junction diode is a basic semiconductor device that controls the flow of electric current in a circuit. It has a positive (p) side and a negative (n) side. If you're reading this lesson on a computer or laptop that is plugged into an electrical outlet, then you're probably making use of such a diode right now. If you continue, you'll find out where you'll most likely find this diode.
But for now, let's talk about the makeup of a p-n junction diode. It's actually quite a simple little thing. Most of them are made with silicon which allows the diode to operate at higher temperatures, important to prevent overheating of your electronics. To make a p-n junction diode, a different impurity is added to each side of a silicon semiconductor to change how many extra holes or electrons are present. In a pure silicon semiconductor, there's an equal number of holes to electrons. If there are more holes than electrons, then that side is the p-side. If there are more electrons than holes, then it becomes the n-side. However, just because there is a positive and negative side, it doesn't mean the material is in any way electrically charged. Because the impurities have been added, the material is still electrically neutral. It's just that the added impurities either leave holes or add more free electrons.
When you place a positive side with a negative side together, you get a p-n junction which is also a p-n diode. Therefore, you get the name p-n junction diode.
On drawings, diodes are drawn with a triangle pointing to a line. The triangle acts as an arrow showing you in which direction the current is flowing. The base of the triangle is the positive side and the end with the line is the negative side of the diode. Current flows from positive to negative. If current tries to flow the other way, then the diode blocks the current, hence the line at the tip of the triangle. That's to show that if current tries to flow this direction, it won't work.
Answer:
mark brilliant
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