A) \[{{n}_{p}}>{{n}_{e}}.\]
B) \[{{n}_{p}}={{n}_{e}}.\]
C) \[{{n}_{p}}<{{n}_{e}}.\]
D) \[{{n}_{p}}\ne {{n}_{e}}.\]
Correct Answer: D
Solution :
[d] In extrinsic semiconductor the number of holes are not equal to number of electrons i.e., \[{{n}_{p}}\ne {{n}_{e}}\] In P ? type \[{{n}_{p}}>{{n}_{e}}\] In N ? type \[{{n}_{e}}>{{n}_{p}}\] But overall both P & N - type semi-Conductor ale-uncharged.
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