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
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12