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The diagram Fig.12 shown a piece of pure...

The diagram Fig.12 shown a piece of pure semiconductor S in series with a variable resistor R, and a source of constant voltage V. Would you increase or decrease the value of R to keep the reading of ammeter constant, when semi-conductor S is heated? Give reason.

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Value of R should be increased with the increase in temperature of semiconductor as circuit resistance decreases and current tends to increase.
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ALLEN-SEMICONDUCTORS-Part-3(Exercise-4)
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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 depletion layer of a reverse - biased p - n junc...

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

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  9. When npn transistor is used as an amplifler

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

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

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

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

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

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

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

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

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

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

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