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Identify the property which is not chara...

Identify the property which is not characteristic for a semiconductor ?

A

At a very low temperatures, it behaves like an insulator

B

At higher temperatures two types of charge carriers will cause conductivity

C

The charge carriers are electrons and holes in the valence band at higher temperatures

D

The semiconductor is electrically neutral

Text Solution

Verified by Experts

The correct Answer is:
C

At the higher temperature only electrons cross the forbiden gap and reach in valence band.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-SEMICONDUCTORS-Exercise 1 ( MISCELLANEOUS PROBLEMS )
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  6. In a common emitter transistor amplifier, the output resistance is 500...

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  7. The current gain of a transistor in a common base arrangement in 0.98 ...

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  8. A tuned amplifier circuit is used to generate a carrier frequency of 2...

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  9. In a common-base amplifier, the phase difference between the input sig...

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  10. In an n-p-n transistor circuit, the collector current is 9 mA. If 90% ...

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  11. The circuit diagram (see fig.) shows a 'logic combination' with the st...

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  12. The combination of gates shown below yields

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  13. The input resistance of a silicon transistor is 100Omega base current ...

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  14. Pure sodium (Na) is a good conductor of electricity because the 3s and...

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  15. In a common base amplifier circuit, calculate the change in base curre...

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  16. In the figure, potential difference between A and B is

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  17. The circuit shown in the figure contains two diodes each with a forwar...

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  18. The diode used in the circuit shown in the figure has a constant volta...

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  19. In a common emitter amplifier, using output reisistance of 5000 ohm an...

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  20. The length of a germanium rod is 0.58 cm and its area of cross-section...

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