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The electrical conductivity of semicondu...

The electrical conductivity of semicondutor increases when electromagnetic radiation of wavelength shorter than `24800Å` is incident on it. The band gap for the semiconductor is

A

`0.3 eV`

B

`0.5 eV`

C

`0.7 eV`

D

`1.1 eV`

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The correct Answer is:
B
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AAKASH INSTITUTE-SEMICONDUCTOR ELECTRONICS (MATERIAL, DEVICES AND SIMPLE CIRUITS )-Assignment section -B (Objective Type Question)
  1. Pure Si at 300 K has hole and electron densities are 1.5 xx 10^(16)m^(...

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  2. A common emitter transistor amplifier has a current gain of 50. If the...

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  3. A p-n photodiode is manufactured from a semiconductor with band gap of...

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  4. The electrical conductivity of semicondutor increases when electromagn...

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  5. Zener breakdown takes place if

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  6. In a p-n junction, solar cell, the value of photoelectromotive force p...

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  7. In case of an n-p-n transistor, the collector current is always less t...

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  8. The depletion region of p-n junction has a thickness of the order of

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

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  10. A transistor cannot be used as an

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  11. What is the power gain in a CE amplifier, where input resistance is 3k...

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  12. A transistor having alpha = 0.99 is used in a common base amplifier. I...

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  13. A potential difference of 2.5 V is applied across the faces of a germa...

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  14. Three amplifiers each having voltage gain 10, are connected in series....

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  15. The maximum effeciency of full wave rectifier is

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  16. The output across the load resistance R is (##AAKP7NEETPHYSP7C29E0403...

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  17. Which of the following pn junction is not used in reverse bias?

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  18. Which of the following break down of pn junction is reverisble?

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  19. A crystal has bcc structure and its lattice constant is 3.6 A. What is...

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  20. In a transitor (Beta = 50), the voltage across 5 kOmega load resistanc...

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