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What is energy band?...

What is energy band?

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What is the energy gap between valence band 'and conduction band in crystal of insulators ?

Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to (E_(g))_(C),(E_(g))_(Si) and (E_(g))_(Ge) . Which of the following statements is true?

Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to (E_(g))_(C ), (E_(g))_(Si) and (E_(g))_(Ge) . Which of the following statements is true?

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KUMAR PRAKASHAN-SEMICONDUCTOR ELECTRONICS : MATERIALS, DEVICES AND SIMPLE CIRCUITS -Section-D : Multiple Choice Questions (MCQs) (MCQs asked in Competitive Exams)
  1. What is energy band?

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  2. At absolute zero temperature Si acts as ……..

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  3. The energy band gap is maximum in …….

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  4. Formation of covalent bonds in compounds exhibits …….nature.

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  5. By increasing the temperature, the specific resistance of a conductor ...

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  6. The difference in the variation of resistance with temperature in a me...

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  7. In the middle of the electron layer of a reverse biased p-n junction, ...

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

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  9. The manifestion of band structure in solids is due to …….

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  10. When p-n junction diode is forward biased ………

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  11. The electrical conductivity of a semiconductor of a semiconductor incr...

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  12. In a full wave rectifier circuit operating from 50 Hz mains frequency...

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  13. Ratio of number density of holes is (7)/(5) and ratio of their current...

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  14. Which of the following is true ?

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  15. A charge of 2 xx 10^(-2) C moves at 30 revolutions per second in a ci...

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  16. A solid which is transparent to visible light an whose conductivity in...

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  17. As shown in the following figure take A and B input waveforms. Sketch...

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  18. A logic circuit is shown in the diagram. Draw the output signal at the...

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  19. Carbon, silicon and germanium have four valence electrons each. At roo...

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  20. Figure shows electric field lines in which an electric dipole P is pla...

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  21. As shown in the following figure, take A and B input waveforms. Sketch...

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