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Surface Tension
Quiz 2
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Q.1
The rain drops are in spherical shape due to
viscosity
thrust on drop
surface tension
residual pressure
Q.2
A square wire frame of size L is dipped in a liquid. On taking out, a ,embrane is formed. If the surface tension of liquid is T, force acting on the entire frame will be
2TL
4TL
8TL
10TL
Q.3
The force required to seperate two glass plates of area 10-2m2 with a film of water 0.05mm thickness between them is (surface tension of water isx 10-3N/m)
25N
20N
14N
28N
Q.4
8 mercury drops coalesce to form 1 mercury drop, the energy changes by a factor of
1
2
4
6
Q.5
The force of attraction between the molecules of the same substance is called as
adhesive force
force of surface tension
cohesive force
electrostatic force
Q.6
The surface tension of liquid decreases with a rise in
viscosity of the liquid
temperature of the liquid
diameter of container
thickness of container
Q.7
The force between two charges depends upon
distance between charges
wavelength
frequency
amplitude
Q.8
Force depends on
mass
speed
length
angle
Q.9
The linear momentum depends upon
velocity
speed
areal velocity
none
Q.10
Wave is
nothing
disturbance in any medium
SHM
created by time
Q.11
Viscosity of fluid increases its speed will
increases
decreases
no change
Q.12
Surface tension is equalto
force/area
forcex are
force/length
Q.13
Surface tension is the phenomenon happens in
liquid
solid
gas
Q.14
The rise in the level of a liquid in a tube is h. If half the amount is poured outside, what will be the new rise in liquid level?
0
h/2
h
2h
Q.15
In which situation is work not being done?
a 26 Kg wagon being pulled
a 30 Kg present being held above the floor
a 60 Kg weight being lifted up off the ground
a 13 Kg cat running across the floor
Q.16
What is the excess pressure inside a soap bubble of radius r
4Tr\frac{4T}{r}r4T
2Tr\frac{2T}{r}r2T
r4T\frac{r}{4T}4Tr
r2T\frac{r}{2T}2Tr
Q.17
At critical temperature surface temperature is
more than 1
exactly 1
zero
infinity
Q.18
Work done in blowing a soap bubble of radius r is
4πr2T4\pi r^2T4πr2T
8πr2T8\pi r^2T8πr2T
8πr3T3\frac{8\pi r^3T}{3}38πr3T
4πr3T3\frac{4\pi r^3T}{3}34πr3T
Q.19
With the rise in temperature, surface tension
increases
decreases
remains the same
becomes zero
Q.20
The molecules existing at One of the following experience unbalanced forces
At the bottom and projecting to the glass bottom
At the walls and projecting to the glass
In the bulk and projecting inside
On the surface and projecting outwards
0 h : 0 m : 1 s
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