Which of the following is a characteristic of a semiconductor?

• It has high electrical conductivity at all temperatures.

• Its conductivity increases with increasing temperature.

• It has zero conductivity at high temperatures.

• Its conductivity decreases with increasing temperature.

Which of the following is an example of a semiconductor material?

• Copper

• Silicon

• Gold

• Iron

In a semiconductor, the charge carriers responsible for electrical conduction are __________ and __________

Which of the following is true for an n-type semiconductor?

• It has an excess of holes.

• It has an excess of electrons.

• The majority charge carriers are protons.

• The conductivity is decreased by increasing temperature.

The two types of extrinsic semiconductors are __________ and __________.