Unit I

Define a metal

• Conduction band and valence band are overlapping

• High band gap

• None of the above

Metals are good conductor of electricity because

• These have free electrons

• Conduction band and valence band are overlapping

• None of the above

• Both 1 and 2

The electrical conductivity of a metal is

• directly proportional to the temperature

• inversely proportional to the temperature

The highest filled energy level at absolute zero is called

As the temperature increases, the thermal conductivity of a metal

• Increases

• Decreases

The equation relating electrical and thermal conductivity is called

At absolute zero, may an electron be found above Fermi level?

• Yes

• No

Above absolute zero, the probability that an electron will be at the Fermi level is

• 0.5

• Less than 1

• 1

Above absolute zero, the probability that an electron will be above the Fermi level is

Above absolute zero, the probability that an electron will be below the Fermi level is