Other Propeties Flashcards
What is resistance
Indicates how difficult it is for electrons to travel through an object
Due to the scattering of electrons due to interactions with atoms and imperfections in a material
What is resistivity
Value that is independent of the sample shape (unlike resistance)
What is conductivity
The ability of electrons to move through a material
Influence of temp on scattering of electrons
Kinetic energy of atoms depends on T
Resistivity increases linear with T
Influence of impurities on scattering
Impurities act as irregularities in the lattice which scatters electrons
What are the 3 types of magnetism
Diamagnetism
Paramagnetism
Ferromagnetism
What is diamagnetism
- normally no dipoles
- during dipoles are opposite to magnetic field
- after no dipoles
What is paramagnetism
- before, random dipoles
- during, dipoles are aligned with the magnetic field
- after, back to random dipoles
What is ferromagnetism
- before, random dipoles
- during, dipoles aligned with the magnetic field
- after, domains stay aligned
Draw and label a hysteresis loop
Check it
What is heat capacity
The amount of heat energy a material needs to absorb to increase temp by one degree
2 ways of energy absorption
- main way, increasing the amount of atomic vibrations
- minor way, increasing the vibrations of any free electrons
What is thermal conductivity
Transfer of thermal energy from a hot body to a cold body
What does heat flux depend on (rate of heat transfer)
Thermal gradient
Thermal conductivity of material
How is heat transferred
- main way, electron vibrations
- minor way, atomic vibrations
