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State the factors, which controls intens...

State the factors, which controls intensity of light, emitted by a LED.

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PUNJAB BOARD PREVIOUS YEAR PAPERS-Semiconductor Devices-Exercise
  1. Draw a circuit diagram with a p-n junction in forward bias.

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  2. Draw a circuit diagram with a p-n junction atreverse bias.

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  3. State the factors, which controls intensity of light, emitted by a LED...

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  4. Draw a circuit diagram to show how a photodiode is biased.

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  5. State the factors, which controls wavelength of light, emitted by a LE...

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  6. What do you mean by depletion region in a p-n junction ?

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  7. Draw a PN-Junction with reverse bias.

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  8. Write briefly, how a Zener diode acts as voltage regulator.

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  9. Write in brief about Photo-diodes.

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  10. Explain the terms depletion layer

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  11. Explain the terms potential barrier for a junction diode.

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  12. In a transistor, base is made very thin.Explain.

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  13. Why a transistor cannot be used as a rectifier ?

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  14. The resistance of a p-n junction is low, when forward biased and is hi...

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  15. What is photo cell ? State its three applications.

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  16. Write briefly, how a Zener diode acts as voltage regulator.

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  17. Why does the thickness of depletion layer of pn-junction increases in ...

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  18. What is a solar cell ? How does it work ? Write its one use.

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  19. Explain how the depletion layer and barrier potential are formed in pn...

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  20. Explain forward bias and reverse bias of the junction diode.

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