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A small impurity is added to germanium t...

A small impurity is added to germanium to get a n-type seiniconductor. This impurity is a  

A

trivalent substance

B

pentavalent substance

C

bivalent substance

D

monovalent substance

Text Solution

Verified by Experts

The correct Answer is:
B
n - type semiconductor is obtained when Si is Ge (tetravalent) is doped with pentavalent impurities like `As, Sb, P` etc.
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MTG GUIDE-ELECTRONIC DEVICES-NEET CAFÉ (TOPICWISE PRACTICE QUESTIONS)
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  2. Which of the following statements is correct?

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  3. A small impurity is added to germanium to get a n-type seiniconductor....

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  4. The impurity atom added to germenium to make it N-type semiconductor i...

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  6. If the ratio of the concentration of electron to that of holes in a se...

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  7. For a p-type semiconductor, which of the following statements is true?

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  8. In a semiconductor material (1//5)th of the total current is carried b...

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  9. A block of pure silicon at 300 K has a length of 10 cm and an area of ...

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  11. A pure semiconductor has equal electron and hole concentration of 10^(...

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  12. An intrinsic semiconductor has a resistivity of 0.50 Omega m at room t...

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  13. p-type semiconductor is obtained by doping

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  14. Conductivity in semiconductor is due to

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  15. Which of the following equations correctly represents the temperature ...

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  16. Region which have no free electron and holes in P-N junction is

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  17. The current flowing through 10 Omega resistor in the circuit shown in ...

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  18. A potential barrier of 0.3 V exists across a p-n junction. If the depl...

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  19. When p-n junction diode is forward biased then

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