CLASSICAL FREE ELCTRON THEORY

emembering: What is the primary concept of classical free electron theory?

• A. Electron drift velocity
• B. Energy bands
• C. Quantum tunneling
• D. Electric resistance

Remembering: Which materials exhibit high electrical conductivity according to classical free electron theory?

• A. Insulators
• B. Semiconductors
• C. Superconductors
• D. Metals

Understanding: How does classical free electron theory explain the thermal conductivity of metals?

• A. Through the vibration of lattice atoms
• B. By the motion of free electrons
• C. Due to the presence of energy bands
• D. Through the exchange of photons

Understanding: According to classical free electron theory, what happens to the electrical resistance of a metal when its temperature increases?

• A. Resistance decreases
• B. Resistance increases
• C. Resistance remains the same
• D. Resistance becomes zero

Applying: In a wire made of a material with high electron mobility, what effect will an increase in the electric field have on the electron drift velocity?

• A. Drift velocity decreases
• B. Drift velocity increases
• C. Drift velocity remains the same
• D. Drift velocity becomes zero

Applying: Based on classical free electron theory, which of the following factors would contribute to higher electrical conductivity in a metal wire?

• A. Increased temperature
• B. Increased impurities
• C. Increased wire length
• D. Decreased wire thickness

Analyzing: A wire made of a material with low electron mobility would have which of the following characteristics according to classical free electron theory?

• A. High electrical resistance
• B. Low electrical resistance
• C. High thermal conductivity
• D. Low thermal conductivity

Analyzing: How does the behavior of free electrons in an insulator differ from that in a metal, as explained by classical free electron theory?

• A. Insulators have energy bands, while metals do not
• B. Insulators have more free electrons than metals
• C. Insulators have lower electron mobility than metals
• D. Insulators have higher electron drift velocity than metals