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

Two cylinders A and B fitted with piston contain equal amount of an ideal diatomic as at temperature ' T ' K . The piston of cylinder A is free to move while that of B is held fixed. The same amount of heat is given to the gas in each cylinder. If the rise temperature of the gas in A is ' $\mathrm{dT}_{\mathrm{A}}$ ', then the rise in temperature of the gas in cylinder B is $\left(\gamma=\frac{\mathrm{C}_{\mathrm{p}}}{\mathrm{C}_{\mathrm{v}}}\right)$

A
$2 \mathrm{dt}_{\mathrm{A}}$
B
$\frac{\mathrm{dT}_{\mathrm{A}}}{2}$
C
$\mathrm{\gamma d T_A}$
D
$\frac{\mathrm{dT}_A}{\gamma}$
2
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
3
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
$\sqrt{42}: 5$
4
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
$1: 2$
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