MHT CET 2025 26th April Evening Shift | Heat and Thermodynamics Question 10 | Physics

Two cylinders A and B fitted with piston contain equal amount of an ideal diatomic gas at temperature T K. The piston of cylinder A is free to move while that of cylinder $B$ is held fixed. The same amount of heat is given to the gas in each cylinder. If the rise of temperature of the gas in A is $\mathrm{dT}_{\mathrm{A}}$, then the rise in temperature of the gas in B is $\left(\gamma=\frac{C_p}{C_v}\right)$

$\frac{\mathrm{dT}_{\mathrm{A}}}{2}$

$\frac{\mathrm{dT}_{\mathrm{A}}}{\gamma}$

$\quad \gamma d T_A$

$\quad 2 \mathrm{dT}_{\mathrm{A}}$

MHT CET 2025 26th April Evening Shift

MCQ (Single Correct Answer)

-0

A black sphere has radius $R$ whose rate of radiation is E at temperature T . If radius is made R / 2 and temperature 3T, the rate of radiation will be

$\frac{3 \mathrm{E}}{2}$

$\frac{27 \mathrm{E}}{8}$

$\frac{81 \mathrm{E}}{4}$

$\frac{9 \mathrm{E}}{4}$

MHT CET 2025 26th April Evening Shift

MCQ (Single Correct Answer)

-0

In the thermodynamic processes, which of the following statements is NOT true?

In an isothermal process, the temperature remains constant.

In an adiabatic process, the system is insulated from surroundings.

In an isochoric process, pressure remains constant.

In an adiabatic process, $\mathrm{PV}^\gamma=$ constant.

MHT CET 2025 26th April Morning Shift

MCQ (Single Correct Answer)

-0

In case of free expansion, which one of the following statements is WRONG?

It is an instantaneous change.

The system is not in thermodynamic equilibrium.

Free expansion can be plotted on a P-V diagram.

It is an uncontrolled change.

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