MHT CET 2021 20th September Morning Shift | Heat and Thermodynamics Question 136 | Physics

Specific heats of an ideal gas at constant pressure and volume are denoted by $$\mathrm{C}_{\mathrm{p}}$$ and $$\mathrm{C}_{\mathrm{v}}$$ respectively. If $$\gamma=\frac{\mathrm{C}_{\mathrm{p}}}{\mathrm{C}_{\mathrm{v}}}$$ and $$\mathrm{R}$$ it's the universal gas constant then $$\mathrm{C}_{\mathrm{v}}$$ is equal to

$$\frac{(\gamma-1)}{(\gamma+1)}$$

$$\frac{(\gamma-1)}{\mathrm{R}}$$

$$\mathrm{R} \gamma$$

$$\frac{R}{(\gamma-1)}$$

MHT CET 2021 20th September Morning Shift

MCQ (Single Correct Answer)

-0

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

$$\mathrm{\frac{5W}{2}}$$

$$\mathrm{\frac{W}{2}}$$

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

MHT CET 2020 19th October Evening Shift

MCQ (Single Correct Answer)

-0

The root mean square velocity of molecules of a gas is $200 \mathrm{~m} / \mathrm{s}$. What will be the root mean square velocity of the molecules, if the molecular weight is doubled and the absolute temperature is halved?

$50 \mathrm{~m} / \mathrm{s}$

$200 \mathrm{~m} / \mathrm{s}$

$100 \mathrm{~m} / \mathrm{s}$

$\frac{100}{\sqrt{2}} \mathrm{~m} / \mathrm{s}$

MHT CET 2020 16th October Evening Shift

MCQ (Single Correct Answer)

-0

Two spherical black bodies of radius $$r_1$$ and $$r_2$$ with surface temperature $$T_1$$ and $$T_2$$ respectively, radiate same power, then $$r_1: r_2$$ is

$$\left(\frac{T_2}{T_1}\right)^4$$

$$\left(\frac{T_2}{T_1}\right)^2$$

$$\left(\frac{T_1}{T_2}\right)^2$$

$$\left(\frac{T_1}{T_2}\right)^4$$

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