18 Questions
What does the solid line in the graph represent?
Wiedemann-Franz Law
At 20°C, which material shows the highest thermal conductivity among the listed metals?
Silver
What is the relationship between thermal conductivity and electrical conductivity according to the Wiedemann-Franz Law?
They are directly proportional
Which metal has the lowest thermal conductivity among the listed materials at 20°C?
Aluminum
What is the main carrier of thermal energy in metals?
Conduction electrons
Based on the graph, which material shows both high thermal and electrical conductivity?
Gold
What is responsible for the conduction of heat in insulators?
Atomic vibrations through the bonds coupling the atoms
How are conduction electrons in metal frequently and randomly scattered?
By thermal vibrations of the atoms
What is the result of applying an electric field to a metal with conduction electrons?
Net drift of electrons along the force of the field
Which type of motion characterizes a conduction electron in a metal in the absence of an applied field?
Random motion with no net drift
What effect does the presence of an applied field have on the motion of a conduction electron?
Superimposes net drift along the x-direction on random motion
Which process is involved in the conduction of heat in insulators?
Generation and propagation of atomic vibrations through atom bonds
What is the average velocity at which electrons drift in a conductor when an electric field is applied?
vdx
In the context of metal conductivity, what is the term used for the physical origin of molecular field theory?
Ferromagnetism
Which type of conductivity is associated with the drift of electrons in a conductor when an electric field is applied?
Metal conductivity
What is the relation between polarizability and frequency in dielectrics, as discussed in the provided text?
Directly proportional
What is the primary classification for types of magnetic materials discussed in the text?
Ferromagnetic and paramagnetic
In the context of heat conduction in insulators, which factor plays a significant role?
Lattice vibrations
Explore the concept of atomic vibrations in insulators and their role in heat conduction. This quiz is based on the figure 2.26 from the Science and Technology Arab Academy AAST course 'Electronic Materials EC210'.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
