Please answer the following questions. 1. Explain the differences between conduc
ID: 2073446 • Letter: P
Question
Please answer the following questions. 1. Explain the differences between conductors, semiconductors, and insulators. 2. Which is a better conductor: intrinsic or extrinsic silicon? 3. Name two elements that can be used to dope silicon to N-type. Name two elements that can be used as P-type dopants 4. What happens to the depletion layer width when the junction is forward biased? Sketch a forward biased PN junction and label the voltage polarity. 5. What happens to the depletion layer width when the junction is reversed biased? Sketch a reversed biased PN junction and label the voltage polarity.Explanation / Answer
1). Answer :-
Examples: Metals, aluminium, copper.
Examples: Paper, Mica glass.
2) Answer :- The conductivity of extrinsic silicon is more than that of intrinsic silicon, therefore extrinsic silicon is better conductor.
3) Answer :- n-type dopants - Phosphorus, Arsenic, Antimony
p-type dopants - Boron, Aluminium.
Conductor Insulator Semiconductor The conductivity of conductor is very high. The conductivity of insulator is very low. The conductivity of semiconductor is moderate. It has very low resistivity. It has very high resistivity. It has moderate resistivity. It has no forbidden gap. It has large forbidden gap. It has small forbidden gap. Conductor has positive temperature coefficient of resistance. Insulator has negative temperature coefficient of resistance. Semiconductor has negative temperature coefficient of resistance. In conductor, both the effect of resistance and temperature are increases. In insulator, effect of resistance is decreases and effect of temperature is increases. In semiconductor, effect of resistance is decreases and effect of temperature is increases. There is large number of electrons available for conduction. There is small number of electrons available for conduction. There is moderate number of electrons available for conduction.Examples: Metals, aluminium, copper.
Examples: Paper, Mica glass.
Examples: Silicon, Germanium.