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The valence band and conduction band of ...

The valence band and conduction band of a solid overlap at low temperature, the solid may be

A

A metal

B

A semiconductor

C

An insulator

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
In conductors valence band and conduction band overlaps.
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Knowledge Check

  • The valence band and the conduction band of a substance overlap at ordinary temperatures The substance may be

    A
    a p-type semiconductor
    B
    a conductor
    C
    an insulator
    D
    an n-type semiconductor

  • The valence band at 0 K is-

    A
    completely filled
    B
    completely empty
    C
    partially filled
    D
    nothing can be said

  • The energy gaps (E_(g)) between valence band and conduction band for diamond, silicon and germanium are in the order

    A
    `E_(g)` (diamond) `gtE_(g)` (silicon)`gtE_(g)` (germanium)
    B
    `E_(g)` (daimond) `ltE_(g)` (silicon) `ltE_(g)` (germanium)
    C
    `E_(g)` (diamond) `=E_(g)` (silicon) `=E_(g)` (germanium)
    D
    `E_(g)` (diamond `gtE_(g)` (germanium) `gtE_(g)` (silicon).

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    A: The energy gap between the valence band and conduction band is greater in silicon than in germanium. R: Thermal energy produces fewer minority carriers in silicon than in germanium.

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    If the energy gap between valence band and conduction band is 10 eV, then the material is a/an

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