Gas is-

A

an elemental semiconductor

B

alloy semiconductor

C

bad conductor

D

metallic semiconductor

Text Solution

Verified by Experts

The correct Answer is:
B
Holes behave as positive charge carriers, electrons have negative charge. Thus, gallium Arsenide is an alloy semiconductor where Ga contributes holes and as contributes electrons.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-SEMICONDUCTORS-Exercise 1 ( TOPICAL PROBLEMS )
  1. Basic building blocks of all electronic circuits are

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  2. In a crystal, atomic separation is around 2A to 3A. At this separation...

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  3. Gas is-

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  4. There is no hole current in conductors because they have

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  5. If N(P) and N(e) be the numbers of holes and conduction electrons in a...

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  6. An n-type and p-type silicon can be obtained by doping pure silicon wi...

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  7. In an insulator, the forbidden energy gap between the valence band and...

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  8. Correct one is

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  9. Forbidden energy gap in a semiconductor is

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  10. In its crystalline structure, every Si or Ge atoms are attached to oth...

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  11. Let n(p) and n(e) be the number of holes and conduction electrons res...

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  12. At elevated temperature, few of covalent bonds of Si or Ge are broken ...

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  13. Carbon, silicon and germanium atoms have four valence electrons each. ...

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  14. A intrinsic semiconductor at a absolute zero of temperature behaves as

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  15. Would there be any advantage to adding n-type or p-type impurities to ...

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  16. The temperature of germanium is decreased from room temperature to 100...

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  17. The contribution in the total current flowing through a semiconductor ...

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  18. Which one of the following statements is false ?

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  19. The forward biased diode connection is

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  20. Reverse bias applied to a junction diode

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