Extrinsic Semiconductors

Q.

Is water a semiconductor?

Q.

A P-type semiconductor can be obtained by adding

1. Arsenic to pure silicon

2. Gallium to pure silicon

3. Phosphorous to pure germanium

4. Antimony to pure germanium

Q. p-type semiconductor are

1. positively charged
2. produced when boron is added as an impurity
3. produced when phosphorus is added as an impurity to silicon
4. produced when carbon is added as an impurity to germanium.