A p-type semiconductor is
(a) positively charged
(b) negatively charged
(c) uncharged
(d) uncharged at O K but charged at higher temperatures.

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Solution

(c) 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.

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A p-type semiconductor is (a) positively charged (b) negatively charged (c) uncharged (d) uncharged at O K but charged at higher temperatures.

A p-type semiconductor is
(a) positively charged
(b) negatively charged
(c) uncharged
(d) uncharged at O K but charged at higher temperatures.