Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion

Discussion Forum : Electronic Devices and Circuits - Section 4 (Q.No. 47)

Electronic Devices and Circuits

47.

An extrinsic semiconductor sample has 6 billion silicon atoms and 3 million pentavalent impurity atoms. The number of electrons and holes is

3 million each

6 billion each

3 million free electrons and very small number of holes

3 million holes and very small number of free electrons

Answer: Option

Explanation:

When pentavalent impurity is added, the number of fresh electrons is very large as compared to number of holes.

Discussion:

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