Question

A p-type semiconductor is

विकल्प

• positively charged

• negatively charged

• uncharged

• uncharged at O K but charged at higher temperatures.

Answer 1

uncharged

A p-type semiconductor is formed by doping a pure semiconductor with a p-type material. As impurity atoms take the position of the germanium atom in a germanium crystal, three electrons of a p-type material form covalent bonds by sharing electrons with three neighbouring germanium atoms. However, the fourth covalent bond is left incomplete, with a want of one electron. This creates a hole. As the atom as a whole is neutral, the p-type material is also neutral.