TIM_2024_1

On which "three whales" are the properties of materials based?

• Structural defects

• Phase composition

• Chemical bonds

• Temperature fluctuations

What three major groups are considered in the properties of material conductivity?

• 1, 2, 3

• A, B, C

• M, D, SC

• X, Y, Z

What law describes the electrical conductivity of materials?

• Law of Coulomb

• Ohm's Law

• Archimedes' Principle

• Newton's Law

What materials exhibit superconductivity?

• Glass, crystals, semiconductors

• Silver, silicon, copper

• Titanium, vanadium, niobium

• Aluminum, gold, molybdenum

What does the coefficient of thermal expansion describe?

• Thermal oscillations of atoms

• Change in material volume with temperature change

• Resistance of material to heat transfer

• Material's thermal conductivity

What does the Wiedemann-Franz law mean?

• What does the Wiedemann-Franz law mean?

• The absence of free electrons, only lattice thermal conductivity

• The relative contribution of lattice thermal conductivity depends on free electrons

• The thermal conductivity of the lattice depends on the mass of the molecules

• The thermal conductivity of electrons is much greater than the thermal conductivity of the lattice

What material has a thermal conductivity coefficient κ = 0.60 [W/cm-K]?

• Bismuth Telluride

• Germanium (n-type)

• Copper

• Stainless Steel

What depends on the scattering mechanism and heat capacity of the lattice (phonons)?

• Thermal conductivity

• Electrical conductivity

• Speed of sound in the material

• Thermal expansion

What properties of materials can be determined by their structural defects?

• Thermal conductivity

• Electrical conductivity

• Magnetic properties

• Optical properties

What is the relationship between temperature and resistance in a conductor?

• Directly proportional

• Inversely proportional

• No relationship

• Exponential relationship