2
practice testMultiple Choice

Practice Test

Question 2 • Physics

Which is a dopant for a semiconductor that conducts electricity due to the movement of electrons?

Answer
A
antimony
B
thallium
C
boron
D
indium

Explanation

A semiconductor that conducts through the movement of electrons is an n-type semiconductor. Antimony has five valence electrons; when added to silicon or germanium, it donates an extra electron that can move through the material. Boron, thallium, and indium are trivalent dopants that typically create holes instead.

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