THERMAL PHYSICS
Part
C Questions
1. a).State
zeroth law of thermodynamics
b). Explain
the construction and working of platinum resistance thermometer
c).Explain
the Callendar and Grifith bridge to measure the resistance and temperature
2. a).State
the first law of thermodynamics
b). Derive an
expression for internal energy (U) based on temperature and volume
c). Derive an
expression for internal energy (U) based on temperature and pressure
3. a). Explain
the working of an ideal carnot’s engine based on four stages
b). State
second law of thermodynamics
4. a). Derive
expressions for entropy of reversible and irreversible processes.
b). Derive
expressions for entropy of isothermal change and adiabatic change.
c). Derive
expressions for entropy of an ideal gas.
5. Derive the
six Maxwell’s thermodynamics equations.
6. a). State
Joule Thomson effect
b). Explain
Porous plug experiment
c). Discuss
the results obtained
7. Explain
the experimental method of liquefaction of helium
8.. Explain
the experimental method of liquefaction of air.
9. a).
Explain adiabatic demagnetization by a suitable experiment.
b). State
third law of thermodynamics.
10. a).
Derive Maxwell distribution equation.
b). Hence
deduce equations for average, mean square and most probable speeds.
11. a).Explain
Lee’s disc method of determining the thermal conductivity of a bad conductor
12. a).Derive
Plack’s law of radiation
b). Deduce
Rayleigh Jean’s law and Wien’s law
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