Questions
Which of the following statements are true about semi conductors?
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By Expert Faculty of Sri Chaitanya
a
Silicon doped with electron rich impurity is a p-type semiconductor.
b
Silicon doped with an electron rich impurity is an n-type semiconductor
c
Delocalized electrons increase the conductivity of doped silicon
d
An electron vacancy increases the conductivity of n-type semiconductor
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Correct option is B
Silicon doped with an electron rich impurity is a n type semiconductor. Conductivity of n-type semiconductor is due to the presence of free electron. Delocalization of electrons increases the conductivity of doped silicon due to increase in mobility of electron.
Similar Questions
Match the items given in Column I with the items given in Column II.
| Column I | Column II | ||
| A. | Mg in solid state | 1. | p -type semiconductor |
| B. | MgCl2 in molten state | 2. | n-type semiconductor |
| C. | Silicon with phosphorus | 3. | Electrolytic conductor |
| D. | Germanium with boron | 4. | Electronic conductor |
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