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The conduction band and valence band in ...

The conduction band and valence band in a good conductor

A

Are well separated by a forbidden band

B

are overlapped

C

Some times overlap and sometimes separated

D

Have forbidden band

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-SEMICONDUCTOR DEVICES-EXERCISE -I (ENERGY BANDS AND CLASSIFICATION OF SOLIDS )
  1. Which of the energy band diagrams shown in the figure corresponds to t...

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  2. The bond that exists in a semi conductor is

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

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  4. At absolute zero, Si acts as

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

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

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

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

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

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  10. The intrinsic semi conductor behaves as insulator at

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

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

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

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

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

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

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

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  18. Diffusion current in a p-n junction is greater than the drift current ...

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  19. At absolute zero temperature, a crystal of pure Germanium

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  20. In an intrinsic semiconductor, the fermi energy level lies

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