MHT CET 2023 10th May Morning Shift | Heat and Thermodynamics Question 59 | Physics

Heat energy is incident on the surface at the rate of X J/min . If '$$a$$' and '$$r$$' represent coefficient of absorption and reflection respectively then the heat energy transmitted by the surface in '$$t$$' minutes is

$$(a+r) x t$$

$$\frac{(\mathrm{a}+\mathrm{r})}{\mathrm{xt}}$$

$$-(a+r) x t$$

$$\frac{\mathrm{xt}}{(\mathrm{a}+\mathrm{r})}$$

MHT CET 2023 10th May Morning Shift

MCQ (Single Correct Answer)

-0

A sample of gas at temperature $$T$$ is adiabatically expanded to double its volume. The work done by the gas in the process is $$\left(\frac{\mathrm{C}_{\mathrm{P}}}{\mathrm{C}_{\mathrm{V}}}=\gamma=\frac{3}{2}\right) \quad(\mathrm{R}=$$ gas constant $$)$$

$$\operatorname{TR}(\sqrt{2}-2)$$

$$\frac{\mathrm{T}}{\mathrm{R}}(\sqrt{2}-2)$$

$$\frac{\mathrm{R}}{\mathrm{T}}(2-\sqrt{2})$$

$$\mathrm{RT}(2-\sqrt{2})$$

MHT CET 2023 9th May Evening Shift

MCQ (Single Correct Answer)

-0

An ideal gas in a container of volume 500 c.c. is at a pressure of $$2 \times 10^{+5} \mathrm{~N} / \mathrm{m}^2$$. The average kinetic energy of each molecule is $$6 \times 10^{-21} \mathrm{~J}$$. The number of gas molecules in the container is

$$5 \times 10^{25}$$

$$5 \times 10^{23}$$

$$25 \times 10^{23}$$

$$2.5 \times 10^{22}$$

MHT CET 2023 9th May Evening Shift

MCQ (Single Correct Answer)

-0

A gas at N.T.P. is suddenly compressed to onefourth of its original volume. If $$\gamma=1.5$$, then the final pressure is

4 times

1.5 times

8 times

$$\frac{1}{4}$$ times

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