List of top Physics Questions on Thermodynamics asked in IPU CET

During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio of \( \frac{C_p}{C_v} \) for the gas is
A metallic ball has a spherical cavity at its centre. If the ball is heated, what happens to the cavity?
The diagrammatic representation of a heat engine above shows which of the following?

A gas is enclosed in a metal container with a movable piston on top. Heat is added to the gas by placing a candle flame in contact with the container's bottom. Which of the following is true about the temperature of the gas? 

A Carnot engine takes \( 3 \times 10^8 \) cal of heat from a reservoir at 627°C and gives it to a sink at 27°C. The work done by the engine is
A body takes 5 min for cooling from 50°C to 40°C. Its temperature comes down to 33.33°C in the next 5 min. Temperature of the surroundings is
For a monoatomic gas, work done at constant pressure is W. The heat supplied at constant volume for the same rise in temperature of the gas is
A TV tower has a height of 100 m. How much population is covered by TV broadcast, if the average population density around the tower is \( 1000 \, {km}^{-2} \) (radius of Earth = \( 6.4 \times 10^6 \, {m} \))?
A substance's specific heat is a function of its
The coefficient of volume expansion of glycerine is \( 49 \times 10^{-5} \, \text{K}^{-1} \). What is the fractional change in its density for a \( 30^\circ \text{C} \) rise in temperature?
An ideal gas is taken through a cyclic thermodynamical process through four steps. The amounts of heat involved in these steps are \( Q_1 = 5960 \, \text{J} \), \( Q_2 = -5585 \, \text{J} \), \( Q_3 = -2980 \, \text{J} \) and \( Q_4 = 3645 \, \text{J} \), respectively. The value of \( W_4 \) is:
It takes 16 min to boil some water in an electric kettle. Due to some defect, it becomes necessary to remove 10% turns of heating coil of the kettle. After repairs, how much time will it take to boil the same mass of water?
A gas undergoes a process in which its pressure p and volume V are related as \( V p^n = \text{constant} \). The bulk modulus of the gas in this pressure is
Two conductors have the same resistance at 0°C but the temperature coefficients of resistance are $\alpha_1$ and $\alpha_2$. The respective temperature coefficients of their series and parallel combinations are nearly
An air bubble starts rising from the bottom of a lake. Its diameter is 3.6 mm at the bottom and 4 mm at the surface. The depth of the lake is 250 cm and the temperature at surface is 40°C. What is the temperature at the bottom of the lake? Given atmospheric pressure = 76 cm of Hg and $g = 980 \, \text{cm/s^2$}