1
MHT CET 2024 16th May Evening 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 $\mathrm{L}_B$ respectively. Their co-efficients of linear expansion are $\alpha_A$ and $\alpha_B$ respectively. It is observed that the difference between their lengths remain constant at all temperatures. The ratio $L_A / L_B$ is given by

A
$\frac{\alpha_A}{\alpha_B}$
B
$\frac{\alpha_B}{\alpha_A}$
C
$\frac{\alpha_A+\alpha_B}{\alpha_A}$
D
$\frac{\alpha_A+\alpha_B}{\alpha_B}$
2
MHT CET 2024 16th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A liquid drop having surface energy ' $E$ ' is spread into 512 droplets of same size. The final surface energy of the droplets is

A
2 E
B
4 E
C
8 E
D
12 E
3
MHT CET 2024 16th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two radioactive substances A and B have decay constants ' $5 \lambda$ ' and ' $\lambda$ ' respectively. At $\mathrm{t}=0$, they have the same number of nuclei. The ratio of number of nuclei of $A$ to those of $B$ will be $\left(\frac{1}{\mathrm{e}}\right)^2$ after a time interval

A
$\frac{1}{42}$
B
$4 \lambda$
C
$2 \lambda$
D
$\frac{1}{2 \lambda}$
4
MHT CET 2024 16th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A monoatomic ideal gas is heated at constant pressure. The percentage of total heat used in changing the internal energy is

A
$30 \%$
B
$40 \%$
C
$50 \%$
D
$60 \%$
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