Adding a few impurity atoms, like arsenic or gallium, to a semiconductor can produce
A) gravitational repulsion of the impurity atoms, like the expanding universe.
B) abundant thermal inversion.
C) a significant increase in mass, even though the impurity atoms are quite sparse.
D) useful changes in the conductivity.

Question

Quizplus · Accepted Answer

Adding impurity atoms to a semiconductor can alter its conductivity, turning it into an n-type or p-type semiconductor. This is because the impurity atoms create extra electrons or holes in the semiconductor's crystal structure, which can facilitate the flow of current through the material. This is the basis for many electronic devices, such as transistors and diodes. None of the other choices are correct.

Adding a Few Impurity Atoms, Like Arsenic or Gallium, to a Semiconductor