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WorksheetsFree electron theory
Total questions: 13
Worksheet time: 7mins
What is the nature of collisions between free electrons in a metal?
Non-colliding
Partially elastic
Elastic
Inelastic
What is the movement of free electrons in a metal similar to?
Liquid molecules
Solid particles
Plasma ions
Gas molecules
What distribution of velocities do the electron velocities in a metal obey?
Uniform distribution
Maxwell-Boltzmann distribution
Gaussian distribution
Poisson distribution
What is the cause of electric conduction in a metal?
Ions
Free electrons
Neutrons
Protons
What happens to the free electrons when an electric field is applied to the metal?
They move in opposite direction
They stop moving
They move randomly
They move in the same direction
What is the nature of the potential field due to ions fixed in the lattice?
Non-uniform
Uniform
Variable
Zero
What is the mean kinetic energy of a free electron in a metal equal to?
Twice of gas molecule KT
Equal to gas molecule KT
Half of gas molecule KT
Zero
What is the movement of free electrons in a metal governed by?
Classical kinetic theory of gases
Newton's laws of motion
Quantum mechanics
Special relativity
What are the valence electrons of atoms in a metal free to do?
Move in fixed orbits
Move within the nucleus
Move throughout the volume
Move in a straight line
What is the composition of a solid metal at the atomic level?
Only protons
Only nucleus
Nucleus and revolving electrons
Only electrons
What is the effect of temperature on the mean kinetic energy of free electrons in a metal?
It increases linearly
It decreases linearly
It remains constant
It fluctuates randomly
How does the density of free electrons in a metal change with an increase in temperature?
It decreases
It increases
It remains constant
It becomes zero
What is the relationship between the mean free path of free electrons in a metal and temperature?
It increases with temperature
It decreases with temperature
It remains constant with temperature
It becomes zero at high temperatures
