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When npn transistor is used as an ampli...

When npn transistor is used as an amplifler

A

electrons move from base to collector

B

holes move from emitter to base

C

electrons move from collector to base

D

holes move from base to emitter

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The correct Answer is:
D
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ALLEN-SEMICONDUCTORS-Part-3(Exercise-4)
  1. In the middle of the depletion layer of a reverse - biased p - n junc...

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  2. Consider telecommunication through optical fibres. Which of the follow...

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  3. When npn transistor is used as an amplifler

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  4. For a transistor ampliflier in common emiter configuration for load im...

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

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  6. When p-n junction diode is forward biased then

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  7. The electrical conductivity of a semiconductor increases when electrom...

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  8. In a common base ampifier , the phase difference between the input sig...

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  9. If a full wave reactifier circuit is operating from 50 Hz mains, the f...

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  10. In a common base mode of a transition , the collector current is 5.48...

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  11. A solid which is not transperent to visible light and whose conductivi...

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  12. If the ratio of the concentration of electron to that of holes in a se...

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  13. The circuit has two oppsitely ideal diodes in parallel. What is the cu...

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  14. In the following, which one of the diodes is reverse biased ?

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  15. If the lattice constant of this semiconductor is decreased, then which...

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  16. Carbon , silicon and germanium have four valence electrons each . At r...

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  17. If a p-n junction diode, a square input signal of 10 V is applied as s...

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  18. A working transitor with its three legs marked P, Q and R is tested us...

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  19. In the circuit below, A and B represents two inputs and C represents t...

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  20. a p -n juction (D) shown in the figure can act an a rectifier An alter...

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