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Write two application of semiconductor?

Important Questions on Semiconductors

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Determine the current passing through the diode D2 in the circuit given. Assume these are Silicon diodes.

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What is rectification? Explain the working of a bridge rectifier.

 

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Two p - n photodiodes are fabricated from semiconductors with band gap of 2.8eV and 2.6eV, respectively.

Choose the correct statement from the following.

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Match the following List-I with List-II

  List I   List II
A Transistor amplifier I Active region
B Transistor switch II Cut-off region
C Zener diode III Voltage regulator
D Fermi level IV Average energy of charge carriers

The correct answer is:

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On which factors does the electrical conductivity of a pure semiconductor depend at a given temperature?
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Why is a semiconductor virtually an insulator at room temperature
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Explain how solids are classified on the basis of band theory of solids.
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Can you recall - A LEÐ TV screen produces brighter and vivid colours?
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 An intrinsic semiconductor at room temperature has

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Thermistor is a semiconductor device whose temperature coefficient of resistance is

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Electric conduction through semiconductor is due to: