When arsenic is added as an impurity to silicon, the resulting material is

Question

When arsenic is added as an impurity to silicon, the resulting material is (A) n-type conductor (B) n-type semiconductor (C) p-type semiconductor (D) none of these.

Tardigrade Admin · Accepted Answer

Arsenic is pentavalent, therefore when added with silicon it leaves one electron as a free electron. In this case the conduction of electricity is due to motion of electrons, so the resulting material is n-type semiconductor.

Q. When arsenic is added as an impurity to silicon, the resulting material is

n-type conductor

n-type semiconductor

p-type semiconductor

none of these.

Arsenic is pentavalent, therefore when added with silicon it leaves one electron as a free electron. In this case the conduction of electricity is due to motion of electrons, so the resulting material is n-type semiconductor.