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When will the conductivity of a Ge semic...

When will the conductivity of a Ge semiconductor decrease?

A

On adding donor impurity

B

On adding acceptor impurity

C

On making UV light incident

D

On decreasing the temperature

Text Solution

Verified by Experts

The correct Answer is:
D
On decreasing the temperature
Decreasing the temperature less electrons a escaping from covalant bond and less holes a produced. Therefore number of electric charge decreases and conductance decreases.
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KUMAR PRAKASHAN-SEMICONDUCTOR ELECTRONICS : MATERIALS, DEVICES AND SIMPLE CIRCUITS -Section-D : Multiple Choice Questions (MCQs) (MCQs From .DARPAN. Based On Textbook)
  1. The energy band diagram of a Si semiconductor crystal at absolute zero...

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  2. The band gaps of a conductor, semiconductor and insulator are respecti...

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  3. When will the conductivity of a Ge semiconductor decrease?

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  4. On increasing the temperature, width forbidden gap ….

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  5. A piece of copper and piece of germanium and cooled upto 80 K temperat...

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  6. Resistivity of metal …… and resistivity on semiconductor …… on tempera...

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  7. Give electronic configuration of silicon.

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  8. Give electronic configuration of germanium.

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  9. When the semiconductor is heated ……..

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  10. Electric field is applied to a semiconductor. In it density of conduct...

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  11. The density of electron and holes in an intrinsic semiconductor is n( ...

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  12. …… is the charge on hole.

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  13. Holes and electrons are …..

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  14. To prepare the n-type semiconductor from a tetravalent Si or Ge, the i...

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  15. In intrinsic semiconductor the drift velocity of holes and electron a...

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  16. In a semiconducting material the mobilities of electrons and holes are...

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  17. To make a p-type semiconductor out of pure silicon, it has to mix atom...

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  18. p-type semiconductor is formed when …….. (A) As impurity is mixed i...

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  19. Is there any benefit to adding trivalent or pentavalent impurity to th...

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  20. Trivalent and pentavalent impurities are ….., respectively in terms o...

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