Q.1.
A force of $$100N$$ is applied on an area of $$4m^2$$. the pressure being applied on the area is
-
50%
$$50Pa$$
-
0%
$$25 Pa$$
-
50%
$$12.5 Pa$$
-
0%
$$400Pa$$
Q.2.
Ink does not spill out of an ink dropper when the atmospheric pressure and ____ pressure are equal.
-
0%
external
-
0%
internal
-
100%
air
-
0%
vaccuum
Explanation
Q.3.
State whether the following statements are true or false?
(i) the pressure inside our body is equal to the atmospheric pressure
(ii) pressure is inversely proportional to the area.
(i) the pressure inside our body is equal to the atmospheric pressure
(ii) pressure is inversely proportional to the area.
-
0%
Both are true
-
0%
Both are false
-
0%
(i) True(ii) False
-
0%
(i) False(ii) True
Q.4.
What happens when pressure inside a sealed can is less than the atmospheric pressure?
-
0%
The can is crushed
-
0%
The can bursts
-
0%
No change is observed
-
0%
The can swells
Q.5.
Mark the correct statements
-
0%
Force exists only as a result of an interaction of two objects
-
0%
Newton's first law of motion, gives us notion of external forces
-
0%
Contact forces are forces in which the two interacting objects are physically in contact with each other
-
0%
All
Q.6.
Two vessels, one cylindrical and another cubical are filled by water to the same height. Near the base, lateral pressure exerted by the liquid on the wall
-
0%
will be more for cylindrical vessel
-
0%
will be more for cubic vessel
-
0%
will be same for both the vessels
-
0%
will be zero
Q.7.
To move a roller, a force of $$300 N$$ is required. You alone can produce a force of $$30 N$$. How many of your friends who are equally strong as you should join you to move the roller?
-
0%
9
-
0%
10
-
0%
5
-
0%
None of these
Q.8.
The tremendous pressure exerted by air can be demonstrated by :
-
0%
Crushing can experiment
-
0%
Hydraulic press
-
0%
Altimeter
-
0%
All
Explanation
Q.9.
Pressure which a fluid exerts on the sides of a container , below its free surface is known as
-
0%
Fluid pressure
-
0%
lateral pressure
-
0%
Atmospheric pressure
-
0%
None
Q.10.
A force can change:
-
0%
shape of a body
-
0%
size of a body
-
0%
direction of motion
-
0%
all the above
Q.11.
In crushing can experiment, the vaccum inside the can causes .......in pressure.
-
0%
Increase
-
0%
Decrease
-
0%
No change
-
0%
All
Q.12.
In crushing can experiment the can gets crushed because of:
-
0%
decrease in internal pressure
-
0%
Increase in internal pressure
-
0%
increase in atmospheric pressure
-
0%
decrease in atmospheric pressure
Explanation
Q.13.
When we press the bulb of dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to:
-
0%
Pressure of water
-
0%
Gravity of the earth
-
0%
Shape of rubber bulb
-
0%
Atmospheric pressure
Q.14.
On a body, a force of $$5N$$ is applied towards North and another force of $$2N$$ is applied towards South. Net force on the body is
-
0%
$$3N$$
-
0%
$$7N$$
-
0%
$$5N$$
-
0%
$$2N$$
Q.15.
At what position the fluid experiences more pressure
-
0%
At the bottom of container
-
0%
At top of container
-
0%
In the middle of container
-
0%
Outside the container
Q.16.
When pressure exerted on fluids by container, then the force is always parallel to the wall. Is the statement true or False
-
0%
True
-
0%
False
Q.17.
Which of the following are the common consequences of atmospheric pressure in our daily life.
-
0%
Sucking a drink with a straw
-
0%
Filling a syringe with a liquid
-
0%
Filling ink in a fountain pen
-
0%
All of the above
Q.18.
In terms of physics, which of the following are considered as fluids?
-
0%
Solids and Gases
-
0%
Gases and liquids
-
0%
Only liquids
-
0%
Liquids and solids
Q.19.
The fluid itself exerts pressure whose force component is equal to its ___________. Complete the sentence.
-
0%
Height
-
0%
Weight
-
0%
Depth
-
0%
None
Q.20.
Fluid pressure comprises of which of the following pressures?
-
0%
Air pressure
-
0%
Water pressure
-
0%
Gauge pressure
-
0%
Both A and B
Q.21.
Identify the following shows the application of pressure in our everyday life?
-
0%
The blade of Ice-skating shoe is very sharp
-
0%
It is easier to drive a sharp tipped nail into wood
-
0%
Sharp knife cuts better
-
0%
Foundation of high-rise building are kept wide
Q.22.
A block of mass of a $$2kg$$ with dimensions $$5cm\times 20cm\times 10cm$$ respectively. The ratio of minimum to maximum pressure it exerts on the change in orientation is:
-
0%
$$1:1$$
-
0%
$$1:2$$
-
0%
$$1:4$$
-
0%
$$4:1$$
Q.23.
Why does a sharp knife enable us to cut through things more easily?
-
0%
The pressure exerted is lesser when the same force is used
-
0%
The pressure exerted is greater when the same force is used
-
0%
The sharp edge can pass through the material slowly
-
0%
The sharp edge is not felt when cutting through the material
Q.24.
Liquid pressure at a point in a liquid does not depend on the
-
0%
Density of liquid
-
0%
Shape of the vessel in which the liquid is kept
-
0%
Depth of the point from the surface
-
0%
Acceleration due to gravity
Q.25.
With the increase in the area of contact of an object the pressure
-
0%
increases
-
0%
decreases
-
0%
is not affected
-
0%
none of these
Q.26.
Compare the pressure exerted by a sharp needle on a surface and the pressure exerted by a blunt needle.
-
0%
The pressure exerted by a sharp needle is more
-
0%
The pressure exerted by a blunt needle is more
-
0%
The pressure exerted by both is equal
-
0%
None of these
Explanation
Q.27.
Which of the following is a correct statement regarding the pressure due to fluids?
-
0%
Force acting on the wall due to pressure is always perpendicular to it because of collision between the molecules takes place perpendicular to it.
-
0%
Force acting on the wall due to pressure is always perpendicular to it because of collision between the molecules takes place oblique to it.
-
0%
Force acting on the wall due to pressure is always oblique to it because of collision between the molecules takes place perpendicular to it.
-
0%
Force acting on the wall due to pressure is always perpendicular to it because of collision between the molecules takes place at any direction to it but its normal reaction on the wall is always perpendicular to it.
Q.28.
The resultant of two opposite parallel forces $$12\ N$$ and $$7\ N$$ is _____ N
-
0%
$$12$$
-
0%
$$5$$
-
0%
$$19$$
-
0%
$$7$$
Q.29.
In the superhit film 'Raja Hindustani', Amir Khan greets his beloved by shaking hand. What kind of force do they exert?
-
0%
Nuclear
-
0%
Gravitational
-
0%
Weak
-
0%
Electromagnetic
Q.30.
The two femurs each of the cross-sectional area 10 cm$$^2$$ support the upper part of a human body of mass 40 kg. The average pressure sustained by the femurs is then (Takes g= 10 m s$$^{-2}$$)
-
0%
2 x 10$$^3$$ N m$$^{-2}$$
-
0%
2 x 10$$^4$$ N m$$^{-2}$$
-
0%
2 x 10$$^5$$ N m$$^{-2}$$
-
0%
2 x 10$$^6$$ N m$$^{-2}$$.