1
MHT CET 2021 21th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two small drops of mercury each of radius '$$R$$' coalesce to form a large single drop. The ratio of the total surface energies before and after the change is

A
$$\sqrt{2}: 1$$
B
$$2^{2 / 3}: 1$$
C
$$2^{1 / 3}: 1$$
D
$$2: 1$$
2
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

What should be the radius of water drop so that excess pressure inside it is 72 Nm$$^{-2}$$ ? (The surface tension of water 7.2 $$\times$$ 10$$^{-2}$$ Nm$$^{-1}$$)

A
1 mm
B
2 mm
C
8 mm
D
4 mm
3
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A body of density $$V$$ is dropped from (at rest) height '$$h$$' into a lake of density '$$\delta$$' $$(\delta > \rho)$$. The maximum depth to which the body sinks before returning to float on the surface is [Neglect all dissipative forces]

A
$$\frac{(\delta-\rho)}{2 h \rho}$$
B
$$\frac{2 h \rho}{(\delta-\rho)}$$
C
$$\frac{h \rho}{2(\delta-\rho)}$$
D
$$\frac{h \rho}{(\delta-\rho)}$$
4
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

The surface energy of a liquid drop is 'U'. It splits up into 512 equal droplets. The surface energy becomes

A
8 U
B
6 U
C
4 U
D
2 U
MHT CET Subjects
Physics
Mechanics
Optics
Electromagnetism
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Calculus
Coordinate Geometry
EXAM MAP
Joint Entrance Examination
JEE MainJEE AdvancedWB JEEBITSATMHT CET
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN