1
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A cylindrical rod is having temperatures $\theta_1$ and $\theta_2$ at its ends. The rate of heat flow is $\mathrm{Q} J / \mathrm{S}$. All the linear dimensions of the rod are doubled by keeping the temperature constant. The new rate of flow of heat is

A
$\mathrm{4Q}$
B
$\mathrm{2 Q}$
C
$\frac{\mathrm{Q}}{2}$
D
$\mathrm{\frac{Q}{4}}$
2
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A monoatomic ideal gas, initially at temperature $T_1$ is enclosed in a cylinder fitted with frictionless piston. The gas is allowed to expand adiabatically to a temperature $T_2$ by releasing the piston suddenly. $L_1$ and $L_2$ are the lengths of the gas columns before and after the expansion respectively. The ratio $T_2 / T_1$ is

A
$\left[\frac{\mathrm{L}_1}{\mathrm{~L}_2}\right]^{2 / 3}$
B
 $\left[\frac{\mathrm{L}_2}{\mathrm{~L}_1}\right]^{2 / 3}$
C
$\left[\frac{L_2}{L_1}\right]^{1 / 2}$
D
$\left[\frac{L_1}{L_2}\right]^{1 / 2}$
3
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In an ideal gas at temperature $T$, the average force that a molecule applies on the walls of a closed container depends on $T$ as $\mathrm{T}^{\mathrm{x}}$. The value of $x$ is

A
0.25
B
2
C
0.5
D
1
4
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Heat engine operating between temperature $T_1$ and $T_2$ has efficiency $\frac{1}{6}$. When $T_2$ is lowered by 62 K , its efficiency increases to $\frac{1}{3}$. Then $T_1$ and $T_2$ respectively are

A
$372 \mathrm{~K}, 310 \mathrm{~K}$
B
$372 \mathrm{~K}, 330 \mathrm{~K}$
C
$330 \mathrm{~K}, 268 \mathrm{~K}$
D
$310 \mathrm{~K}, 248 \mathrm{~K}$
MHT CET Subjects
EXAM MAP