Question
Download Solution PDFWhat is the cause of formation of depletion layer at a p-n junction?
Answer (Detailed Solution Below)
Option 4 : all of the above
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NHPC & THDC JE Civil Full Test 1
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Detailed Solution
Download Solution PDFCONCEPT:
- The material which is not a good conductor or a good insulator is called as a semiconductor. For example: Silicon, Germanium, etc.
- The semiconductor device which is used to control the flow of electric current is called a p-n junction diode.
- The depletion region/layer is an area at the junction where a field is formed because of the formation of a negative charge layer on the p side and a positive charge layer on the n side
EXPLANATION:
- The holes and electrons formed because of doping or impurities, diffuse to the other side respectively.
- So when a hole diffuses across the junction, it leaves a negative donor ion and the electron leaves a positive charge on the n side.
- These oppositely charged layers form a field due to the potential difference between the points which form the depletion region.
- All of the stated points contribute to the formation of the depletion region at the junction. So option 4 is correct.
Last updated on May 12, 2025
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