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प्रश्न
Give reasons : Silicon on doping with Phosphorous forms n-type semiconductor.
उत्तर
Phosphorus is electron rich as it is element of group 15. When it is doped with element of group 14 i.e silicon an n-type semiconductor will form because here conductivity is due to the presence of extra electrons.
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संबंधित प्रश्न
To prepare n-type semiconductor the impurity to be added to silicon should have the following number of valence electrons:
(a) 2
(b) 3
(c) 4
(d) 5
A pure semiconductor is ________.
(a) an extrinsic semiconductor
(b) an intrinsic semiconductor
(c) p-type semiconductor
(d) n-type semiconductor
Distinguish between p-type and n-type semiconductors.
What is the ratio of octahedral holes to the number of anions in hexagonal closed packed structure?
Group 14 element is converted to p-type semiconductor by doping it with:
To get n-type of semiconductor, germanium should be doped with ____________.
p-type semiconductors are formed when Si or Ge are doped with ____________.
Which of the following oxides behaves as conductor or insulator depending upon temperature?
Under the influence of electric field, which of the following statements is true about the movement of electrons and holes in a p-type semiconductor?
(i) Electron will move towards the positvely charged plate through electron holes.
(ii) Holes will appear to be moving towards the negatively charged plate.
(iii) Both electrons and holes appear to move towards the positively charged plate.
(iv) Movement of electrons is not related to the movement of holes.
Explain why does conductivity of germanium crystals increase on doping with galium.
