Wednesday, March 13, 2013


THERMAL PHYSICS

PART A QUESTIONS

UNIT I

Define heat
Define temperature
State zeroth law of thermodynamics
What is the principle of platinum resistance thermometer?
What are advantages and disadvantages of platinum resistance thermometer?
What is a thermodynamic system?
What are thermodynamics variables?
What is a quasistatic process?
State first law of thermodynamics

UNIT II

What is reversible process?
What is irreversisble process?
What are the parts of Carnot’s engine
What Carnot’s heat engine is an ideal heat engine
State Carnot’s theorem
Define entropy
What is thermodynamic scale of temperature?

UNIT III

What are the applications of Maxwell thermodynamics relations
State Joule Thomson effect
What are the results of porous plug experiment
What is adiabaltic demagnetization
State third law of thermodynamics

UNIT IV

What is the significance of kinetic theory of gases
Write the Maxwell distribution law equation
Write the equation for average speed of molecule.
Write the equation for root mean square speed of molecule.
Write the equation for most probable speed of molecule.
What is the ratio of three speeds namely average speed, root mean square speed and most probable speed?

UNIT V

Define coefficient of thermal conductivity
Define a black body
State Kirchoff’law
State Wien’s law
State Stefan Boltzmann law
State Planck’s law of radiation
State Rayleigh Jean’s law



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