Question 187: Semiconductors and Logic Gates

Question

Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate ?

Accepted Answer

$Si$ and $Ge$ are semiconductors but $C$ is an insulator. Also, the conductivity of $Si$ and $Ge$ is more than $C$ because the valence electrons of $Si, Ge$ and $C$ lie in third, fourth and second orbit respectively.

Answer

The number of free electrons for conduction is significant only in $Si$ and $Ge$ but small in $C.$

Answer

The number of free conduction electrons is significant in $C$ but small in $Si$ and $Ge.$

Answer

The number of free conduction electrons is negligibly small in all the three.

Answer

The number of free electrons for conduction is significant in all the three

Semiconductors and Logic Gates

Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate ?

Choose the correct answer: