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A piece of copper and another of germani...

A piece of copper and another of germanium are cooled from room temperature to `80 K`. The resistance of

A

each of these decreases

B

copper strip increases and that of germanium decreases

C

copper strip decreases and that of increases germanium

D

each of these increases.

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AAKASH SERIES-SEMICONDUCTOR DEVICES-EXERCISE - IA
  1. The bond that exists in a semi conductor is

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

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

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

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  5. The intrinsic semi conductor behaves as insulator at

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  6. The energy gap for an insulator may be

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

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

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

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  10. When an impurity is doped into an intrinsic semiconductor, the conduct...

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

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

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  13. The mobility of free electron is greater than that of free holes becau...

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  14. The value indicated by fermi-energy level in an intrinsic semiconducto...

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  15. A semiconducting device is connected in a series in circuit with a bat...

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  16. Pure semiconductor is known as

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  17. A doped semiconductor is

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  18. The potential barrier, in the depletion layer , is due to

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  19. A P-type semiconductor can be formed by doping Si or Ge with

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  20. An-type and P-type silicon can be obtained by doping pure silicon with

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