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A piece of copper and piece of germanium...

A piece of copper and piece of germanium and cooled upto 80 K temperature so ……

A

resistance of both increases

B

resistance of both increases

C

resistance of copper piece increases and piece of germanium decreases.

D

resistance of copper piece decreases and piece of germanium increases.

Text Solution

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The correct Answer is:
D
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KUMAR PRAKASHAN-SEMICONDUCTOR ELECTRONICS : MATERIALS, DEVICES AND SIMPLE CIRCUITS -Section-D : Multiple Choice Questions (MCQs) (MCQs From .DARPAN. Based On Textbook)
  1. When will the conductivity of a Ge semiconductor decrease?

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  2. On increasing the temperature, width forbidden gap ….

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  3. A piece of copper and piece of germanium and cooled upto 80 K temperat...

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  4. Resistivity of metal …… and resistivity on semiconductor …… on tempera...

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  5. Give electronic configuration of silicon.

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  6. Give electronic configuration of germanium.

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  7. When the semiconductor is heated ……..

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  8. Electric field is applied to a semiconductor. In it density of conduct...

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  9. The density of electron and holes in an intrinsic semiconductor is n( ...

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  10. …… is the charge on hole.

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  11. Holes and electrons are …..

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  12. To prepare the n-type semiconductor from a tetravalent Si or Ge, the i...

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  13. In intrinsic semiconductor the drift velocity of holes and electron a...

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  14. In a semiconducting material the mobilities of electrons and holes are...

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  15. To make a p-type semiconductor out of pure silicon, it has to mix atom...

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  16. p-type semiconductor is formed when …….. (A) As impurity is mixed i...

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  17. Is there any benefit to adding trivalent or pentavalent impurity to th...

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  18. Trivalent and pentavalent impurities are ….., respectively in terms o...

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  19. The ratio of number density of free electron and hole in p-type semico...

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  20. The number density of electron is 4.5xx10^(22)m^(-3) and number densi...

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