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प्रश्न
Which of the following oxides behaves as conductor or insulator depending upon temperature?
विकल्प
TiO
SiO2
TiO3
MgO
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उत्तर
TiO3
Explanation:
TiO3 behaves as conductor or insulator depending on temperature because of variation of energy gap between valence band and conduction band with the variation of temperature.
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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
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Give reasons : Silicon on doping with Phosphorous forms 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?
A group of 14 elements is converted into n-type semiconductor by doping it with:
In n-type semiconductor, current is carried by ____________.
To get n-type of semiconductor, germanium should be doped with ____________.
p-type semiconductors are formed when Si or Ge are doped with ____________.
To get a n-type semiconductor from silicon, it should be doped with a substance with valence ______.
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.
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Explain why does conductivity of germanium crystals increase on doping with galium.
How does the doping increase the conductivity of semiconductors?
