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When does electron-hole recombination ta...

When does electron-hole recombination take place?

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When an electron in the conduction band jumps to the valence band, energy is released in the form of light or heat depending upon the energy and wavelength. Electrons occupy the vacant site and thus recombination takes place after losing the energy.
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SUBHASH PUBLICATION-SEMICONDUCTOR ELECTRONICS-TWO MARKS QUESTIONS WITH ANSWERS
  1. Give the logic symbol, Boolean expression and truth table of a NAND ga...

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  2. Give the logic symbol, Boolean expression and truth table of a NOR gat...

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  3. Write the Boolean equation for a NOR gate and a NAND gate

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  4. Name the two types of integrated circuits.

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  5. How are electron-hole pairs created in a semiconductor?

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  6. When does electron-hole recombination take place?

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  7. Give a schematic two-dimensional representation of an intrinsic Si or ...

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  8. Draw energy band diagram of an intrinsic semiconductor at room tempera...

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  9. Draw I-V characteristics of a Zener diode with neat labelling.

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  10. Draw a neat labelled diagram of a Zener diode used as a DC voltage reg...

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  11. Write the symbols for a NPN and PNP transistors.

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  12. Draw the output characteristic curve for a CE transistor circuit.

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  13. Give the expression for voltage gain in a CE amplifier along with the ...

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  14. What is a tuned circuit?

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  15. If the following waveform is applied to an OR gate, then write the out...

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  16. Mention a few important criteria for the selectrion of a material for ...

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  17. Identify the terms SSI, MSI, LSI and VLSI with respect to digital Ics.

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  18. Explain the working of a zener diode as a voltage regulator.

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  19. Explain the working of a forward biased p-n junction diode.

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  20. Explain the working of a reverse biased p-n junction diode.

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