EASY
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The forbidden gap in the energy bands of germanium at room temperature is about 

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Important Questions on Semiconductors

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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 17
The fermi energy for a substance is (T is the temperature)-
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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 18
The electrical conductivity of a semiconductor increases when electromagnetic radiation of a wavelength shorter than 2480 nm is incident on it. Find the band gap of the semiconductor. [Given h=6.63×10-34J s, c=3×108 m s-1]
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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 19
For a given solid, closely spaced energy levels of all electrons in a particular orbit is called
 
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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 20
In insulators,
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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 21
The energy band gap is maximum in,
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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 22
The bandgap in germanium and silicon in eV respectively are
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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 23
Metals are good conductors of heat as compared to the insulators because
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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 24
The main distinction between conductors, semiconductors and insulators is concerned with