Choose the correct statement. In conductors,

  • A
    valence band and conduction band overlap each other.
  • B
    valence band and conduction band are separated by a large energy gap.
  • C
    very small number of electrons are available for electrical conduction.
  • D
    valence band and conduction band are separated by a small energy gap.

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$GaAs$ (Gallium Arsenide) is a ....... .

Explain the crystalline structure by writing the electronic configuration of elementary semiconductors.

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The energy band diagrams for three semiconductor samples of silicon are as shown. We can then assert that

The conductivity of a semiconductor increases with an increase in temperature because

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