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There is no hole current in conductors b...

There is no hole current in conductors because they have

A

have large forbidden energy gap

B

have overlapping valence and conduction bands

C

are full of electron gas

D

have no valence band

Text Solution

Verified by Experts

The correct Answer is:
B
In good conductors, which are metals there is no gap between valence band and conduction band. Hence, no holes exist.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-SEMICONDUCTORS-Exercise 1 ( TOPICAL PROBLEMS )
  1. In a crystal, atomic separation is around 2A to 3A. At this separation...

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  2. Gas is-

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

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

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

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

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  7. Correct one is

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  8. Forbidden energy gap in a semiconductor is

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

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

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

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

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

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

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

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

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  17. Which one of the following statements is false ?

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  18. The forward biased diode connection is

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  19. Reverse bias applied to a junction diode

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  20. In a reverse biased p-n junction, when the applied bias voltages is eq...

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