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Doping materials are called impurities, ...

Doping materials are called impurities, because they

A

make semiconductor less pure

B

change chemical properties

C

alter the crystal structure

D

change the number of charge carriers

Text Solution

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The correct Answer is:
B
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NIKITA PUBLICATION-SEMICONDUCTORS-MCQS
  1. Which of the following is a typical example of a semiconductor ?

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  2. A hole in semiconductor is different from an electron, because it is

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  3. Doping materials are called impurities, because they

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  4. The movement of a hole is brought about by the vacancy being filled...

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  5. The electrical conductivity of p-type semiconductor is determined by t...

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  6. The electrical conductivity of intrinsic and p-type semiconductor incr...

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  7. In germanium crystal, a hole is provided by an impurity of

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  8. When N-type of semiconductor is heated

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  9. The number of electrons in the valence shell of a semiconductor is

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  10. The resistivity of a semiconductor at room temperature is in bet...

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  11. Which of the following is correct about the nature of net charge on...

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  12. A pure semiconductor has

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  13. The majority charge carriers in P -type semiconductor are

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  14. To obtain a P-type germanium semiconductor, it must be dopped with

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  15. An n-type semiconductor is

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  16. An n-type germanium is obtained, on doping intrinsic germaniurn, by

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  17. In an n-type semiconductor, the concentration of minority carriers mai...

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  18. When arsenic is added as an impurity to silicon, the resulting materia...

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  19. Semiconductor of both p-type and n-type are produced by

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  20. Semiconductor is damaged by the strong current due to

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