Question

In pure germanium crystal near the absolute zero of temperature,(a) the conduction band is completely empty(b)there are about 10" free electrons per cubic metre(3)there are equal number of holes and electrons(d) the forbidden energy gap is 1.21 ev.​

Answer 1

Answer:

I don't know someone else

Answer 2

The conduction band is completely empty.

(a) is correct option

Explanation:

Pure germanium crystal :

Germanium is a pure semiconductor. Pure Germanium crystal at absolute zero has electrons only in the valence band. The conduction band is empty at absolute zero temperature. So, it acts as an insulator at 0 K.

At zero temperature, The energy band gap is more between the conduction band and valance band of pure germanium crystal.

The energy bag gap is 0.7 eV.

Hence, The conduction band is completely empty.

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Topic : semiconductor

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