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Carbon, silicon and germanium have four ...

Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to `(E_g)_C, (E_g)_(Si), and (E_g)_(Ge)`. Which of the following statements is true?

A

`(E_(g))_(s i) lt (E_(g) )_(ge) lt (E_(g))_C `

B

`(E_g )_C lt (E_g)_(Ge) gt (E_G)_(s i)`

C

`(E_g )_c gt (E_G )_(si ) gt E_(g) _( G e)`

D

`(E_(g))_C = (E_g)_(s i) =(E_(g))_(Ge)`

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-SEMICONDUCTOR DEVICES-EXERCISE -I (ENERGY BANDS AND CLASSIFICATION OF SOLIDS )
  1. Carbon, silicon and germanium have four valence electrons each. These ...

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  2. C, Si and Ge have same lattice structure. Why is C insulator while Si ...

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  3. Which of the following statements is not true

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  4. Which of the following is correct

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  5. Which of the energy band diagram shown in the figure corrensponds to t...

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  6. The bond that exists in a semi conductor is

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

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  8. At absolute zero , Si acts as

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  9. On increasing the temperature, the specific resistance of

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  10. A solid which is not transparent to visible light end whose conductivi...

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  11. A piece of copper and another of germanium are cooled from room temper...

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  12. In a good conductor, what is the energy gap between the conduction b...

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  13. In a semiconductor, the separation between conduction band and valence...

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  14. The intrinsic semi conductor behaves as insulator at

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  15. The energy gap for an insulator may be

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

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  17. An electric field us applied to a semiconductor.Let the number of char...

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  18. Lets npand ne be the number of holes and conduction electrons in an in...

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

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

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