HARD
Earn 100
Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate ?
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Important Questions on Semiconductor Electronics: Materials, Devices and Simple Circuits
EASY
If the forbidden energy gap in a substance is , substance is a
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The bonding is germanium crystal (semiconductor) is
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The chromium ions doped in the ruby rod:
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The band gaps of an insulator, semiconductor and conductor are respectively .The relationship between them can be given as:
EASY
Which of the energy band diagrams shown in the figure corresponds to that of a semiconductor?
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Choose the correct option :
Electrical conductivity of a semiconductor-
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The energy gap is much more in silicon than in germanium because
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The Forbidden gap between conduction band & valance band is maximum for ______
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The band gaps of an insulator, conductor and semiconductor are respectively and The relationship between them is given as _____.
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Consider a situation in which reverse biased current of a particular junction increases when it is exposed to a light of wavelength During this process, enhancement in carrier concentration takes place due to generation of hole-electron pairs. The value of band gap is nearly.
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Arrange the following in order of increasing band gap
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Choose the correct statement. In conductors
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A semiconductor with equal concentration of acceptor and donor type impurities is termed as
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When will the conductivity of a Ge semiconductor decrease?
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The resistivity of a semiconductor at room temperature is in between
MEDIUM
As the temperature increases, the electrical resistance
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The scientific principle involved in 'Laser' is____
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The band gap in and in respectively is
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A positive hole in a semiconductor is
