1
MHT CET 2024 11th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A metal rod having coefficient of linear expansion $2 \times 10^{-5} /^{\circ} \mathrm{C}$ is 0.75 m long at $45^{\circ} \mathrm{C}$. When the temperature rises to $65^{\circ} \mathrm{C}$, the increase in length of the rod will be

A
3.0 mm
B
0.75 mm
C
0.30 mm
D
0.15 mm
2
MHT CET 2024 11th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of the velocity of sound in hydrogen gas $\left(\gamma=\frac{7}{5}\right)$ to that in helium gas $\left(\gamma=\frac{5}{3}\right)$ at the same temperature is

A
$1: 1$
B
$7: 3$
C
$21: 25$
D
$\sqrt{42}: 5$
3
MHT CET 2024 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two spheres $S_1$ and $S_2$ have same radii but temperatures $T_1$ and $T_2$ respectively. Their emissive power is same and emissivity in the ratio 1:4. Then the ratio $T_1: T_2$ is

A
$2: 1$
B
$\sqrt{2}: 1$
C
$1: \sqrt{2}$
D
$1: 2$
4
MHT CET 2024 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two gases A and B having same initial state ( $\mathrm{P}, \mathrm{V}, \mathrm{n}, \mathrm{T}$ ). Now gas A is compressed to $\frac{\mathrm{V}}{8}$ by isothermal process and other gas B is compressed to $\frac{\mathrm{V}}{8}$ by adiabatic process. The ratio of final pressure of gas $A$ and $B$ is (Both gases are monoatomic, $\gamma=5 / 3$)

A
$\frac{1}{8}$
B
$\frac{1}{4}$
C
$\frac{1}{64}$
D
$\frac{1}{12}$
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