7
QuizMultiple Choice

Transistors — Quiz

Question 7 • Physics

Which best describes an example of a p-type semiconductor?

Answer
A
It uses arsenic so that electrical conduction is due to the movement of a positive charge.
B
It uses boron so that electrical conduction is due to the movement of a positive charge.
C
It uses arsenic so that electrical conduction is due to the movement of electrons.
D
It uses boron so that electrical conduction is due to the movement of electrons.

Explanation

A p-type semiconductor is made by adding an acceptor impurity, such as boron, which creates holes in the material. These holes act as positive charge carriers, so conduction is mainly due to their movement. Arsenic typically creates an n-type semiconductor, where electrons carry the current.

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