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Which of the following is correct?...

Which of the following is correct?

A

Forbidden energy gap is the energy gap between the valence band and conduction band

B

Forbidden energy gap may be empty or may be partially filled with electrons

C

No electron will exist in the forbidden energy gap

D

Both 1 and 3

Text Solution

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The correct Answer is:
D
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AAKASH SERIES-SEMICONDUCTOR DEVICES-EXERCISE -I (ENERGY BANDS AND CLASSIFICATION OF SOLIDS )
  1. Carbon, silicon and germaniumn have same lattice structure. But charbo...

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  2. Which of the following statements is not true?

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  3. Which of the following is correct?

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  4. Which of the energy band diagrams shown in the figure corresponds to t...

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  5. The bond that exists in a semi conductor is

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  6. The conduction band and valence band in a good conductor

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  7. At absolute zero, Si acts as

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  8. By increasing the temperature, the specific resistance of a conductor ...

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  9. A solid which is transparent to visible light and whose conductivity i...

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  10. A piece of copper and a piece of germanium are cooled from te...

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  11. In a conductor, the forbidden energy gap is of the order of

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  12. In a semiconductors the separation between conduction band and valence...

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  13. The intrinsic semi conductor behaves as insulator at

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  14. The forbidden energy gap in an insulator is of the order of

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  15. In case of a semi conductor, which one of the following statements is ...

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  16. An electric field is applied to a semiconductor. Let the number of cha...

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  17. Let np, and nc be the numbers of holes and conduction electrons in an ...

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  18. If the two ends of a p-n junction are joined by a wire

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  19. The drift current in a p-n junction is

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  20. The diffusion current in a p - n junction is

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