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

Three identical metal spheres (of same surface area) have red, black and white colors and they are heated up to same temperature. They are allowed to cool. Arrange them from maximum rate of cooling to minimum rate of cooling

A
black, red, white
B
white, red, black,
C
red, black, white
D
red, white, black
2
MHT CET 2024 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

At certain temperature, $\operatorname{rod} \mathrm{A}$ and $\operatorname{rod} \mathrm{B}$ of different materials have lengths $\mathrm{L}_{\mathrm{A}}$ and $\mathrm{L}_{\mathrm{B}}$ respectively. Their coefficients of linear expansion are $\alpha_A$ and $\alpha_B$ respectively. It is observed that the difference between their lengths remains constant at all temperatures. The ratio $\mathrm{L}_{\mathrm{A}}: \mathrm{L}_{\mathrm{B}}$ is given by

A
$\frac{\alpha_A}{\alpha_B}$
B
$\frac{\alpha_B}{\alpha_A}$
C
$\frac{\alpha_A+\alpha_B}{\alpha_A}$
D
$\frac{\alpha_A+\alpha_B}{\alpha_B}$
3
MHT CET 2024 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The internal energy of a gas will increase when it

A
expands adiabatically.
B
is compressed adiabatically.
C
expands isothermally.
D
is compressed isothermally.
4
MHT CET 2024 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A gas is contained in closed vessel. The initial temperature of the gas is $100^{\circ} \mathrm{C}$. If the pressure of the gas is increased by $4 \%$, the increase in the temperature of the gas is

A
$2^{\circ} \mathrm{C}$
B
$3^{\circ} \mathrm{C}$
C
$4^{\circ} \mathrm{C}$
D
$5^{\circ} \mathrm{C}$
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