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The forbidden gap in germanium crystal i...

The forbidden gap in germanium crystal is

A

0.7eV

B

`1.12 xx 10^(-19)`J

C

Both 1 and 2

D

1.1eV

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • The maximum wavelength of electromagnetic radiation, which can create a hole-electron pair in germanium. (Given that forbidden energy gap in germanium is 0.72 eV)

    A
    `1.7xx10^(-6)` m
    B
    `1.5xx10^(-5)` m
    C
    `1.3xx10^(-4)` m
    D
    `1.9xx10^(-5)` m

  • If a small amount of antimony is added to germanium crystal

    A
    its resistance is increased
    B
    it becomes a p-type semiconductor
    C
    there will be more free electrons than holes in the semiconductor
    D
    none of these

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