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In semiconductor the valence band at 0 ...

In semiconductor the valence band at 0 K is

A

completely filled

B

completely empty

C

partially filled

D

nothing can be said

Text Solution

Verified by Experts

The correct Answer is:
A
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Knowledge Check

  • n-type semiconductor ………

    A
    energy levels of impurity atoms `E_(D)` are nearer to valence energy level `E_(V)`.
    B
    energy levels of `E_(D)` are nearer to conduction energy levels `E_(C )`.
    C
    energy levels `E_(D)` are in middle of energy levels `E_(C ) and E_(V)`.
    D
    energy level `E_(D)` are on the top of energy levels.

  • A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. It can detect a signal of wavelength ……..

    A
    4000 nm
    B
    6000 nm
    C
    4000 Å
    D
    6000 Å

  • When the electromagnetic radiation of maximum wavelength of 2480 nm is incident on semiconductor. The band gap energy of semiconductor is ……eV. [6.6xx10^(-34)JS, C=3xx10^(8)m//s, 1eV=1.6xx10^(-19)J]

    A
    0.9
    B
    0.7
    C
    0.5
    D
    1.1

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