1
MHT CET 2024 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

An ideal gas $(\gamma=1.5)$ is expanded adiabatically. To reduce root mean square velocity of molecules two times, the gas should be expanded

A
20 times
B
16 times
C
12 times
D
8 times
2
MHT CET 2024 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A black body radiates power ' P ' and maximum energy is radiated by it at a wavelength $\lambda_0$. The temperature of the black body is now so changed that it radiates maximum energy at the wavelength $\frac{\lambda_0}{4}$. The power radiated by it at new temperature is

A
64 P
B
256 P
C
4 P
D
16 P
3
MHT CET 2024 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The temperature of a liquid falls from 365 K to 359 K in 3 minutes. The time during which temperature of this liquid falls from 342 K to 338 K is [Let the room temperature be 296 K ]

A
6 min
B
4 min
C
3 min
D
2 min
4
MHT CET 2024 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In an isobaric process of an ideal gas, the ratio of work done by the system (W) during the expansion and the heat exchanged $(\mathrm{Q})$ is $\left(\gamma=\frac{\mathrm{C}_{\mathrm{p}}}{\mathrm{C}_{\mathrm{v}}}\right)$

A
$\gamma$
B
$\gamma-1$
C
$\frac{\gamma}{\gamma-1}$
D
$\frac{\gamma-1}{\gamma}$
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