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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 77 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 germanium increases

D

each of these increases

Text Solution

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The correct Answer is:
c
With the decrease of temperature, the resistance of copper (a metallic conductor) decreased while that of germanium (a semiconductor) increases.
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FULL MARKS-SEMICONDUCTOR ELECTRONICS-Additional question(M. C.Q)
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  6. The part of a transistor, which is heavily doped to produce a large nu...

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  7. when NPN transistor is used as an amplifier then ……….

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  8. In a common-base amplifier, the phase difference between the input sig...

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  9. In a common-base mode of a transistor, the collector current is 5.488 ...

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  10. Match the following

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  11. In a fcc lattice structure, what is the effective number of atoms?

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  12. Monoclinic crystal lattice has dimensions

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  13. In insulators

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  14. The valence band and conduction band of a solid overlap at low tempera...

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  15. If germanium is dopped with arsenic, that will result in

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  16. n-type semiconductor is

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  17. To a germanium crystal equal number of aluminium and indium atoms are ...

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  18. The dominant contribution to current comes from holes in case of

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  19. For a heavily doped n-type semiconductor, fermi-level lies

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  20. The coordination number for a bcc crystal is

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