Question

A pure semiconductor behaves like an insulator at 00 K becauce

1 -There is no recombination of electrons with holes

2- Drift velocity of free electrons is very small

3-Free electrons are not available for current conduction

4 -Energy possessed by electrons at that low temperature is almost zero

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Answer 1

Answer:

4 number option is correct anwer

Answer 2

Answer:

Explanation:

(4) is the correct option.

Energy possessed by electrons at that low temperature is almost zero.

A semiconductor's band gap is of the order of 3 eV at absolute zero. At zero degrees Celsius, a semiconductor behaves like an insulator because the electrons in the valence band lack the energy to transition to the conduction band.

Semiconductors :

Semiconductors can be pure elements like germanium or silicon or compounds like gallium arsenide. The ideas, characteristics, and mathematical strategy governing semiconductors are explained by physics. Semiconductors include, for example: Silicon, germanium, and gallium arsenide are three of the most popular semiconductors.

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