Question

Let $n_{p}$ and $n_{e}$ be the numbers of holes and conduction electrons in an extrinsic semiconductor, then :

• A. $ {{n}_{p}}>{{n}_{e}} $
• B. $ {{n}_{p}}={{n}_{e}} $
• C. $ {{n}_{p}}<{{n}_{e}} $
• D. $ {{n}_{p}}\ne {{n}_{e}} $

Answer 1

Answer: (D)

In an extrinsic semiconductor, number of holes cannot be equal to number of electron, that is $ n_{p}\ne n_{e}. $