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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

  • For a pure semiconductor energy band shown at 0K choose correct option:

    A
    B
    C
    D
  • In a semiconductor, the energy gap between the valence and conduction bands is 1. 1 eV. It is expressed in joules as

    A
    `1.2xx10^(-19)` J
    B
    `1.76xx10^(-19)` J
    C
    `1.6xx10^(-19)` J
    D
    `3.2xx10^(-19)` J
  • Consider the following statements - 1. In a semiconductor, the uppermost band is the valence band 2. All semiconductors are electrically neutral 3. with increases of temperature the resistivity of a semiconductor decreases 4. Addition of a small amount of impurity of a III or V group elements to a pure semiconductor increases its resistivity Choose the correct statements :

    A
    1 and 2
    B
    2 and 3
    C
    3 and 4
    D
    1 and 4
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