MHT CET 2024 16th May Evening Shift | Heat and Thermodynamics Question 39 | Physics

At certain temperature, $\operatorname{rod} \mathrm{A}$ and $\operatorname{rod} \mathrm{B}$ of different materials have lengths $\mathrm{L}_{\mathrm{A}}$ and $\mathrm{L}_B$ respectively. Their co-efficients of linear expansion are $\alpha_A$ and $\alpha_B$ respectively. It is observed that the difference between their lengths remain constant at all temperatures. The ratio $L_A / L_B$ is given by

$\frac{\alpha_A}{\alpha_B}$

$\frac{\alpha_B}{\alpha_A}$

$\frac{\alpha_A+\alpha_B}{\alpha_A}$

$\frac{\alpha_A+\alpha_B}{\alpha_B}$

MHT CET 2024 16th May Evening Shift

MCQ (Single Correct Answer)

-0

A monoatomic ideal gas is heated at constant pressure. The percentage of total heat used in changing the internal energy is

$30 \%$

$40 \%$

$50 \%$

$60 \%$

MHT CET 2024 16th May Evening Shift

MCQ (Single Correct Answer)

-0

The ratio of the specific heats $\frac{C_p}{C_v}=\gamma$, in terms of degrees of freedom ( n ) is

$\left(1+\frac{1}{n}\right)$

$\left(1+\frac{2}{n}\right)$

$\left(1+\frac{\mathrm{n}}{3}\right)$

$\left(1+\frac{\mathrm{n}}{2}\right)$

MHT CET 2024 16th May Morning Shift

MCQ (Single Correct Answer)

-0

Assuming the expression for the pressure exerted by the gas, it can be shown that pressure is

$\left(\frac{3}{4}\right)^{\text {th }}$ of kinetic energy per unit volume of a gas.

$\left(\frac{2}{3}\right)^{\text {rd }}$ of kinetic energy per unit volume of a gas.

$\left(\frac{1}{3}\right)^{\mathrm{rd}}$ of kinetic energy per unit volume of a gas.

$\left(\frac{3}{2}\right)^{\text {rd }}$ of kinetic energy per unit volume of a gas.

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