Electronics and Communication Engineering - Materials and Components - Discussion

Discussion Forum : Materials and Components - Section 2 (Q.No. 13)
13.
In a pure sample of silicon
the number of holes and free electrons is always equal
the number of free electrons is more than the number of holes
the number of free electrons and holes is equal at low temperature
the number of free electrons is less than number of holes
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.

Ashwini said:   1 decade ago
Exactly, in intrinsic semiconductor equal number of holes and electrons are present (i.e Pairing of electrons and holes takes place) therefore there is no current flow.

Divya said:   1 decade ago
Pure silicon is nothing but intrinsic semiconductor.

In intrinsic semiconductor number of electrons is equal to number of holes due to which no free electrons present no current conduction takes place in intrinsic semiconductors.

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