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serious draback of the semiconductors de...

serious draback of the semiconductors devices is __

A

they cannot be used with high voltage

B

thy pollute the environment

C

they are costly

D

they do not last for long time

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TARGET PUBLICATION-SEMICONDUCTORS-EXERCISE
  1. a semiconductorX is made by doping a germanium crytsal with arsenic (z...

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  2. the dominant mecahnisms for motion of chargecarriers in forward and re...

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  3. serious draback of the semiconductors devices is

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  4. in LED, to avoid damage to the diode is used

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  5. in LED, intensity of emitted light

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  6. which of the foll. Is NOT an appliction of photodiode?

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  7. in a p-n junction photo cell, the value of photo-electromotive force p...

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  8. Assertion :light emitting diode (LED) emits spontaneous radiation reas...

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  9. thermistors may have

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  10. which of the foll. Graphs represents NTC thermistors

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  11. the circuit has two oppositely connected ideal diodes in parallel. Wha...

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  12. a p-n junction diode when forward biased has a drop of 0.4 V which is ...

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  13. for a photodiode , the forbidden energy gap (E8)of the material used i...

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  14. if the band gap between valence band and conduction band in a matereia...

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  15. in insulatore (C.B. is conduction band and V.B. is a valence band)

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  16. the energy gap in case of which of the foll. Is less than 3eV?

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  17. the band gap of an insulator , conductor and semic conductor are E(gI)...

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  18. C and Si bot have same lattice structure , having bomnding electrons ...

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  19. the density of an electron-hole pair in a pure germanium is3 ×10^(16)m...

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  20. a semiconductor has equal electron and hole concetration of2x10^8 m^(-...

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