1
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A diatomic ideal gas is used in Carnot engine as a working substance. If during the adiabatic expansion part of the cycle, the volume of the gas increases from V to 32 V , the efficiency of the engine is

A
0.25
B
0.50
C
0.75
D
0.90
2
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two spherical black bodies of radii ' $R_1$ ' and ' $\mathrm{R}_2$ ' and with surface temperature ' $\mathrm{T}_1$ ' and ' $\mathrm{T}_2$ ' respectively radiate the same power. The ratio of ' $R_1$ ' to ' $R_2$ ' will be

A
$\left(\frac{T_2}{T_1}\right)^4$
B
$\left(\frac{T_2}{T_1}\right)^2$
C
$\left(\frac{T_1}{T_2}\right)^4$
D
$\left(\frac{T_1}{T_2}\right)^2$
3
MHT CET 2024 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Rate of flow of heat through a cylindrical rod is ' $\mathrm{H}_1$ '. The temperature at the ends of the rod are ' $T_1$ ' and ' $T_2$ '. If all the dimensions of the rod become double and the temperature difference remains the same, the rate of flow of heat becomes ' $\mathrm{H}_2$ '. Then

A
$\mathrm{H}_2=4 \mathrm{H}_1$
B
$\mathrm{H}_2=2 \mathrm{H}_1$
C
$\mathrm{H}_2=\frac{\mathrm{H}_1}{2}$
D
$\mathrm{H}_2=\frac{\mathrm{H}_1}{4}$
4
MHT CET 2024 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A fixed mass of gas at constant pressure occupies a volume ' V '. The gas undergoes a rise in temperature so that the r.m.s. velocity of the molecules is doubled. The new volume will be

A
$\frac{V}{2}$
B
$\frac{\mathrm{V}}{\sqrt{2}}$
C
$2 \mathrm{~V}$
D
4 V
MHT CET Subjects
EXAM MAP