1
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A perfectly black body emits a radiation at temperature 'T$$_1$$' K. If it is to radiate at 16 times this power, its temperature 'T$$_2$$' K should be

A
8T$$_1$$
B
4T$$_1$$
C
2T$$_1$$
D
16T$$_1$$
2
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

One mole of an ideal gas expands adiabatically at constant pressure such that its temperature $$T \propto {1 \over {\sqrt V }}$$. The value of $$\gamma$$ for the gas is ($$\gamma = {{{C_p}} \over {{C_v}}},V = $$ Volume of the gas)

A
1.8
B
1.5
C
1.3
D
1.4
3
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

On an imaginary linear scale of temperature (called 'W' scale) the freezing and boiling points of water are 39$$^\circ$$ W and 239$$^\circ$$ W respectively. The temperature on the new scale corresponding to 39$$^\circ$$C temperature on Celsius scale will be

A
139$$^\circ$$ W
B
78$$^\circ$$ W
C
117$$^\circ$$ W
D
200$$^\circ$$ W
4
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$$\frac{(\gamma-1)}{(\gamma+1)}$$
B
$$\frac{(\gamma-1)}{\mathrm{R}}$$
C
$$\mathrm{R} \gamma$$
D
$$\frac{R}{(\gamma-1)}$$
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