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The electrical conductivity of a semicon...

The electrical conductivity of a semiconductor increase when electromagnetic radiation of wavelength shorter than 2480 nm is incident on it. The band gap in eV for the semiconductor is

A

0.9

B

0.7

C

0.5

D

1.1

Text Solution

Verified by Experts

The correct Answer is:
c
`E_(g)=(hc)/(lambda_max)=(1237.5eVnm)/(2480nm)=0.5eV`
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FULL MARKS-SEMICONDUCTOR ELECTRONICS-Additional question(M. C.Q)
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  3. Which of the following statements is not true?

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  5. A transistor is used in the common emitter mode as an amplifier. Then

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  6. The energy band gap is maximum in

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  7. At absolute zero, Si acts as

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

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  9. In the middle of the depletion layer of reverse biased p-n junction, t...

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  10. A full wave rectifier is operating at 50 Hz, 220v the fundamental freq...

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  11. The part of a transistor, which is heavily doped to produce a large nu...

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

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

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

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  15. Match the following

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

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  17. Monoclinic crystal lattice has dimensions

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  18. In insulators

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

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

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