TNPSC Physics - General Properties of Matter
Exam Duration: 45 Mins Total Questions : 30
Consider the following statements
1. Those substances, with expand on freezing, have their melting point lowered by the increase of pressure, where as those substances which contract on freezing have their melting points raised by the increase of pressure.
2. The phenomenon that ice melts on application of pressure and again solidifies when the pressure is released is known as regelation.
Which of the statements(s) given above is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
Both 1 and 2
- (d)
Neither 1 nor 2
Consider the following statements
An external pressure po is applied to the surface of liquid in a container. Then,
1. The pressure on all side walls increase by po
2.The pressure on the bottom wall increased by po .
3. The pressure at all points inside the liquid increases by po .
Which of the statement(s) given above is/are correct?
- (a)
1, 2 and 3
- (b)
1 and 2
- (c)
1 and 3
- (d)
2 and 3
Two pieces of different metals, when completely immersed in water, experience equal upthrust, then
- (a)
both pieces have same density
- (b)
both pieces have equal volume
- (c)
both pieces have equal weight in air
- (d)
None of the above
A steel ball is floating in a beaker containing mercury. If some water is poured in the beaker, the steel ball will
- (a)
move up
- (b)
move down
- (c)
continue its position
- (d)
execute vertical oscillation
An inflated balloon is floating on the surface of water. It is pushed so as to submerge completely and then released. It will
- (a)
sink to the bottom
- (b)
come back to its earlier position
- (c)
remain submerged at the same place
- (d)
first sink to the bottom and then come up
A body is just floating in a liquid if the body is slight pressed down and released. It will
- (a)
start oscillating
- (b)
sink to the bottom
- (c)
come back to the same position immediately
- (d)
come back to the same position
Consider the following statements
When an object floats inside a liquid, then
1. The apparent weight of the object is equal to the liquid displaced by the object.
2. The centre of gravity (CG) of the object and the centre of gravity (CG) of the displaced water lie in the same vertical line
Which of the above statements(s) given above is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
Both 1 and 2
- (d)
Neither 1 nor 2
Surface tension depends on
- (a)
atmospheric pressure
- (b)
nature of the liquid
- (c)
temperature of the liquid
- (d)
All of the above
If a liquid wets a solid surface, the angle of contact is
- (a)
0o C
- (b)
less than 900
- (c)
greater than 90o
- (d)
90o
If two conducting sphere are separately charged and then brought in contact
- (a)
the total energy of the two spheres is conserved
- (b)
the total charge on the two spheres is conserved
- (c)
both the total energy and the total charge are conserved
- (d)
the final potential is always the mean of the original potential of the two spheres
The surface tension phenomenon is the result of the tendency of system to
- (a)
conserve volume
- (b)
keep surface area minimum
- (c)
keep potential energy minimum
- (d)
conserve energy
Meniscus of mercury in a capillary is
- (a)
plane
- (b)
cylindrical
- (c)
concave
- (d)
convex
When there are no external forces the shape of a liquid drop is determined by
- (a)
viscosity of air
- (b)
density of the liquid
- (c)
temperature of air
- (d)
surface tension of the liquid
Ball pen functions on which one of the following principle?
- (a)
Boyle's law
- (b)
Gravitational force
- (c)
Surface tension
- (d)
Viscosity
An application of Bernoulli's equation for fluid flows is found in
- (a)
viscosity meter
- (b)
capillary rise
- (c)
hydraulic press
- (d)
dynamic lift of an aeroplane
Consider the following statements
1. The viscosity of a gas increases with rise in temperature.
2. The viscosity of the liquid falls very rapidly with rise in temperature.
Which of the statements (s) given above is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
Both 1 and 2
- (d)
Neither 1 nor 2
Consider the following statements and select the correct code
1. For a given stress, the strain produced in glass is much less than that in rubber.
2. In plastic materials, the force of cohesion are very small.
3. Elastic limit is the smallest stress, which results in permanent distortion.
- (a)
1, 2 and 3
- (b)
1 and 2
- (c)
2 and 3
- (d)
1 and 3
Consider the following statements
1. Greater the value of Young's modulus of material, larger is its elasticity.
2. Steel is more elastic than copper.
Which of the statements(s) given above is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
Both 1 and 2
- (d)
Neither 1 nor 2
It is difficult to cut things with a blunt knief because
- (a)
the pressure exerted by knife for a given force increases with increase in bluntness
- (b)
a sharp edge decrease the pressure exerted by knife for a give force
- (c)
a blunt knife decreases the pressure for a given force
- (d)
a blunt knife decreases the area of intersection
The pressure of the earth's atmosphere at sea level is due to the
- (a)
heating of the atmosphere by the sun
- (b)
fact that most living things constantly breathe air
- (c)
evaporation of water from the seas and oceans
- (d)
gravitational attraction of the earth for the atmosphere
The rate of leak from a hole in a tank is
- (a)
more if situated near the bottom
- (b)
more if situated near its top
- (c)
independent of its height from the bottom
- (d)
more at midway between top and bottom
An inflated balloon rises to a definite height once it starts going up. This balloon cannot rise any further because at that height
- (a)
atmosphere pressure reduces to zero
- (b)
apparent weight of the balloon reduces to zero
- (c)
density of the balloon reduces to zero
- (d)
acceleration due to gravity reduces to zero
An ideal liquid flows through a horizontal tube of variable diameter. The pressure is lowest where the
- (a)
velocity is lowest
- (b)
velocity is highest
- (c)
diameter is largest
- (d)
None of the above
Consider the following statements
1. At any point inside the liquid the pressure exerted by the liquid is directly proportional to its depth from the free surface.
2. At every point and in every direction, the pressure exerted inside the liquid at rest is same.
Which of the statement(s) given above is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
Both 1 and 2
- (d)
Neither 1 nor 2
Consider the following statements
1. The boiling point of liquid increases on increasing the pressure on the free surface of the liquid.
2. On heating the solid substance if the volume of the substance increases, then by the application of pressure its melting point increases.
Which of the statement(s) given above is/are correct?
- (a)
1 and 2
- (b)
Only 1
- (c)
Only 2
- (d)
Neither 1 nor 2
The elastic potential energy of a body is
1.Work done by the external force against the deforming force.
2.Work done against the external force by the deforming force.
3.The sum of work done by the external force and the deforming force
Which one option is true?
- (a)
1
- (b)
1 and 3
- (c)
1,2 and 3
- (d)
None of these
Elastically in the material is due to
1.The change or effective radius of the molecules
2.The change in intermolecular distance and restoring forces starts acting on the molecules.
3.The deforming forces acting on it.
Which option is true?
- (a)
1 and 2
- (b)
2 and 3
- (c)
1,2 and 3
- (d)
Only 2
Consider the following statements
1.If a body completely gains its original shape after removal of forces,it is elastic body.
2.The property of restore the natural shape of a body is elasticity.
3.When a body partially regain its original shape after removal of deforming force it is parially elastic.
Which one of the following is/are correct?
- (a)
1 and 2
- (b)
1 and 3
- (c)
2 and 3
- (d)
All are correct
When deep sea fishes are brought to the surface of the sea, their bodies burst..This is because the blood in their bodies flows at very
- (a)
high speed
- (b)
high pressure
- (c)
low speed
- (d)
low pressure
It is difficult to cut things with a blunt knife because
- (a)
the pressure exerted by knife for a given force increase with increase in bluntess
- (b)
a sharp edge decrease the pressure exerted by knife for a given force
- (c)
a blunt knife decreases the pressure for given force.
- (d)
a blunt knife decrease the area of intersection