Question

A p-type semiconductor is

• A. Positively charged
• B. Negatively charged
• C. Uncharged
• D. Neutral

Answer 1

Answer: (C), (D)

Neutral

Explanation for the correct option:

1. A p-type semiconductor is a semiconductor created by doping an intrinsic semiconductor with an acceptor impurity.
2. In a p-type semiconductor, a tetravalent semiconductor like silicon or germanium is doped with a trivalent impurity like aluminium, gallium, or boron.
3. The dopant atom has one less electron than the atoms of the intrinsic semiconductors.
4. Thus, when current is passed through it, the displaced electrons create holes in the lattice structure of the substance.
5. The p-type semiconductor is uncharged, or neutral because there is no addition of charged particles into the semiconductors.

Hence, options C and D are correct.