A) has equal number of holes and free electrons
B) has few holes but no free electrons
C) has few holes and few free electrons
D) does not have any charge carrier
Correct Answer: B
Solution :
Conductors are those through which electric charge can easily flow, while insulators are those through which electric charge is difficult to flow. Solids whose electrical conductivity is intermediate between conductors and insulators are called semiconductors. At absolute zero, a p-type semiconductor which has holes as charge carriers behaves like an ideal insulator and hence, it has a few holes in valence band but no free electrons.
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