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WorksheetsPhysics 1st QA
Total questions: 120
Worksheet time: 3600secs
Scalar quantities have and suitable unit.
magnitude
direction
both a and b
None of them
Vector quantities have along with magnitude and unit.
magnitude
direction
both a and b
None of them
Which one is a vector quantity?
Mass
Weight
Time
temperature
Which one is a scalar quantity?
Time
Force
Velocity
Acceleration
Distance is a _____ quantity.
Vector
Scalar
both a and b
None of these
What is S.1 unit of acceleration?
ms-1
ms-2
nm
m2
What is a S.I Unit of velocity?
Nm
ms-1
ms-2
m2s
Shortest distance between two points is called:
distance
speed
displacement
velocity
The branch of physics which is related with the study of motion of objects is called:
thermodynamics
kinematics
dynamics
mechanics
The word kinematics is derived from Greek word "Kinema" which means:
motion
rest
speed
body
The branch of Mechanics which deals with motion of objects without reference of force which cause motion is called:
thermodynamics
kinematics
dynamics
mechanics
All objects in universe are:
in motion
at rest
oval in shape
None of them
Types of motion are:
five
four
three
two
Motion of a body along a straight line is called:
translatory motion
random motion
vibratory motion
linear motion
The motion of a rider on the Ferris wheel is an example of:
circular motion
rotatory motion
random motion
vibratory motion
Back and forth motion of a body about its mean position is called:
vibratory motion
oscillatory motion
Both 'a' & 'b'
None of them
The motion of the clock's pendulum is an example of:
circular motion
rotatory motion
translatory motion
vibratory motion
The body moves back and forth about mean position in:
vibratory motion
rotatory motion
circular motion
translatory motion
Speed of an object in a certain direction is:
acceleration
velocity
displacement
distance
Acceleration is produced whenever:
the velocity of an object changes
direction of motion of the object changes
Both 'a' & 'b'
None of these
Due to decrease in velocity, acceleration will be:
positive & is in the direction of velocity
negative & is in the direction of velocity
positive & is opposite to that of change velocity
negative & is opposite to that of change velocity
Density is a:
scalar quantity
vector quantity
Both 'a' & 'b'
None of these
The gradient on the distance-time graph is numerically equal to the:
acceleration
speed
force
momentum
When bus travels with non-uniform speed, the distance time graph is a:
broken line
straight line
circle
curve
The gradient on speed - time graph gives the:
acceleration
speed
force
momentum
The basic equations of motion for bodies moving with uniform acceleration are:
two
three
four
five
vi + at =:
aS
2aS
vf
vf2
S = vit + 1/ 2 _____.
vf
vf2
at
at2
2aS = ___.
vf + vi
vf2 + vi2
vf - vi
vf2 - vi2
If two stones of different sizes are dropped from same height simultaneously, which of them will hit the ground first?
Heavier stone
Lighter stone
Both hit the ground at the same time
Depends on the weather
The value of acceleration due to gravity 'g' near the surface of earth is found to be:
9.81 ms-2
9.81 ms-1
9.81 ms
9.81 ms2
Gravitational acceleration is taken negative for objects moving:
upward
downward
left direction
right direction
A pair of unlike parallel forces having different lines of force produce _______.
equilibrium
torque
a couple
unstable equilibrium
Head to tail rule can be used to add ______ forces.
two
three
five
any number of
A force of 15 N makes an angle of 60° with horizontal. Its vertical component will be:
15 N
10 N
13 N
7 N
A body is in equilibrium when it has:
uniform speed
uniform acceleration
both a and b
zero acceleration
A body is in stable equilibrium after slight tilt if its center of gravity:
remains above the point of contact
remains on one side of point of contact
passes over the point of contact
is at lowest position
A body is in unstable equilibrium after slight tilt if its center of gravity:
remains on one side of the point of contact
remains above the point of contact
passes over the point of contact
is positioned at its bottom
A body is in neutral equilibrium when its center of gravity:
is at the lowest position
remains at same height
is at highest position
is at its base
Bunsen burner is made stable by:
increasing its length
increasing its mass
decreasing its base area
increasing its base area
A right rope walker carries a long pole to:
increase his weight
raise his centre of gravity
lower his centre of gravity
keep his centre of gravity in fixed position
Stability of a racing car is increased by:
increasing its height
raising its centre of gravity
decreasing its width
lowering its centre of gravity
The forces that act along opposite directions are called:
parallel forces
like parallel forces
unlike parallel forces
None of these
Force has:
only magnitude
only direction
both magnitude & direction
None of these
Graphical method is used for addition of:
one-dimensional vector quantities
two-dimensional vector quantities
three-dimensional vector quantities
All of these
sin θ = :
base / hypotenuse
perpendicular / hypotenuse
base / perpendicular
perpendicular s/ base
perpendicular / base = :
sin θ
cos θ
tan θ
cosec θ
The turning effect of force is called:
moment of force
torque
Both 'a' & 'b'
None of these
Torque depends upon:
the magnitude of the velocity and fulcrum
the mass & fulcrum
the direction of the force & fulcrum
the magnitude of the force & fulcrum
Moment of force about a point is equal to:
𝜏 = d x F
𝜏 = F x d
𝜏 = d . F
𝜏 = F . d
SI unit of the torque or moment of force is:
Newton
Newton per second
Newton-second
Newton-metre
The Center of gravity of uniform square or a rectangular sheet is the:
point of intersection of its diagonals
the mid-point on its axis
the point of intersection of its medians
its center
The Center of gravity of a uniform triangular sheet is:
point of intersection of its diagonals
the mid-point on its axis
the point of intersection of its medians
its center
They form a couple.
two unlike parallel forces of the same magnitude acting along the same line
two unlike parallel forces of the same magnitude not acting along the same line
two like parallel forces of the same magnitude acting along the same line
two like parallel forces of the same magnitude not acting along the same line
To form a couple, two forces must be:
equal in magnitude
parallel, but opposite in direction
separated by a distance
All of these
A wall hanging, buildings, bridges or any object lying in rest on the ground are some examples of:
dynamic equilibrium
static equilibrium
inertia
acceleration due to gravity
A body must satisfy _____ conditions to be in equilibrium.
two
three
four
five
According to the first condition for equilibrium:
sum of the all forces acting on a body must be constant
sum of the all forces acting on a body must be equal to zero
sum of all torques acting on a body is constant
sum of all torques acting on a body is zero
The following expression represents: F = ma
Newton's first law of motion
Newton's second law of motion
the first condition of equilibrium
the second condition of equilibrium
A paratrooper moving down with terminal velocity satisfies:
law of gravitation
Newton's second law of motion
the first condition of equilibrium
the second condition of equilibrium
According to the second condition for equilibrium:
sum of the all forces acting on a body must be constant
sum of the all forces acting on a body must be equal to zero
sum of all torques acting on a body is constant
sum of all torques acting on a body is zero
States of equilibrium are:
two
three
four
five
When a body is slightly displaced and then released it returns to its previous position then the equilibrium will be:
stable equilibrium
unstable equilibrium
neutral equilibrium
None of these
If a body is slightly titled and does not return back to its previous position, the body is said to be in:
stable equilibrium
unstable equilibrium
neutral equilibrium
None of these
An object with particles close together and vibrating describes a _______.
Gas
Liquid
Solid
All three
A burning candle is an example of ______ state of matter.
Gas
Liquid
Solid
All three
During which process a gas becomes a liquid ______.
Melting
Freezing
Condensing
Boiling
A solid can _______.
have a fixed shape
be easily compressed
take a shape of container
have freely moving molecules
According to kinetic molecular theory, the pressure exerted by a gas is caused by the _______.
bombardment of the gas molecules on the walls of the container.
collision between gas molecules.
large distances between gas molecules.
random motion of the gas molecules.
If a gas is heated in a sealed cylinder, then _______ increases.
pressure inside the container
average kinetic energy of the particles
temperature of the gas
All of them
A gas in a container of fixed volume is heated. What happens to the molecules of the gas?
They collide less frequently.
They expand.
They move faster.
They move further apart.
In a liquid, some energetic molecules break free from the surface even when the liquid is too cold for bubbles to form. What is the name of this process?
boiling
condensation
convection
evaporation
Which states of matter are incompressible?
Solid & Liquid
Solid & Gas
Liquid & Gas
Solid, Liquid & Gas
Which state of matter has low density?
Solid
Liquid
Gas
None of these
Drying of wet clothes and drying of wet floor are the examples of:
freezing
melting
condensation
evaporation
Conversion of matter between three states involves:
physical changes
chemical changes
Both 'a' & 'b'
None of them
Matter is made up of tiny particles called:
atoms
molecules
ions
cells
In 1827, the evidence of molecular motion first discovered by:
Newton
Einstein
Robert Brown
Kepler
A group of atoms is called:
element
molecule
ion
cell
The molecules of the following state of matter are usually arranged in a regular pattern called lattice:
Solids
Liquids
Gases
All of them
Which state of matter has the highest densities?
Solids
Liquids
Gases
All of them
In which state of matter, molecules are found in clusters?
Solids
Liquids
Gases
None of them
In which state of matter, particles are very far apart?
Solids
Liquids
Gases
All of them
Boiling and melting points of gases are:
very low
low
high
very high
The molecules of which state of matter have extremely lowest energies?
Gases
Liquids
Solids
Gases & Liquids
It has lowest boiling and melting points as compared to other substances.
Hydrogen
Helium
Mercury
Oxygen
It is the only metal that is not solid at room temperature.
Tungsten
Helium
Mercury
Copper
If we compress a gas, its pressure:
becomes zero
remains the same
decreases
increases
If a gas is compressed to half of its original volume, its pressure will be:
zero
remains the same
doubled
becomes half
If we decrease the pressure of a gas, the volume of the gas will be:
becomes zero
remains the same
decreases
increases
It is determined by the average translational kinetic energy of molecules of a gas:
Temperature
Pressure
Density
Volume
Heat is the form of:
Pressure
Weight
Energy
All
Heat capacity is the product of mass and ___.
Boiling point
Freezing point
Energy
Specific heat of material
The amount of heat needed to convert a substance from liquid to gas is called:
Heat of vaporization
Specific heat
Latent heat of fusion
All
A fixed temperature at which a pure liquid boils is called:
Melting point
Freezing point
Boiling point
Both 'a' and 'b'
The melting point of ice at normal atmospheric pressure is:
0 °C
0 K
100 °C
Both 'a' and 'b'
Thermal energy transfer required to change a solid into liquid without changing its temperature is called:
Latent heat of Fusion
Latent heat of vaporization
Latent heat of boiling
Specific heat capacity
Thermal energy transfer required to change a liquid into gas without changing its temperature is called:
Latent heat of freezing
Latent heat of vaporization
Latent heat of boiling
Latent heat of melting
Evaporation can occur at:
Freezing point
Melting point
Boiling point
All temperatures
The S.I unit of heat is:
calorie
joule
Celsius
Kelvin
It is the degree of hotness of a body:
Heat
Specific heat
Temperature
Latent heat
Thermometer is a device, used to measure:
temperature
heat
specific heat
latent heat
This scale of temperature is mostly used for environmental measurements:
Kelvin scale
Fahrenheit scale
Celsius scale
Both `a' & 'b'
This scale of temperature is mostly used for industrial measurements:
Kelvin scale
Fahrenheit scale
Celsius scale
Both 'a' & 'b'
Which one is correct to convert temperature from Celsius scale to Kelvin scale?
K = 1.8 °C + 273
K= 1.8 °C - 273
K = °C - 273
K = °C + 273
Which one is correct to convert temperature from Celsius scale to Fahrenheit scale?
°F = 1.8 °C - 32
°F = 1.8 °C + 32
°F = 1.8 °C - 273
°F = 1.8 °C + 273
Which one is correct to convert temperature from Fahrenheit scale to Celsius scale?
°C = °F - 32 / 1.8
°C = °F + 32 / 1.8
°C = °F - 1.8 / 32
°C = °F + 1.8 / 32
Specific heat of water is:
240 Jkg-1K-1
2400 Jkg-1K-1
420 Jkg-1K-1
4200 Jkg-1K-1
Boiling point of water is:
100 K
100 °F
100 °C
92.8 °F
It is a term in physics that describe how much heat is added to a substance to raise its temperature by 1°C:
Latent heat of Fusion
Latent heat of vaporization
Specific heat capacity
Heat capacity
Amount of heat required to raise the temperature of 1 kg of a substance through 1 °C is called:
Latent heat of Fusion
Latent heat of vaporization
Specific heat capacity
Heat capacity
Equation of specific heat capacity 'c' is as under:
Q / ΔT
ΔQ / mΔT
ΔT / mΔQ
mΔQ / ΔT
The heat of fusion for water at 0 °C is approximately:
2230 Joules per gram
2130 Joules per gram
1230 Joules per gram
334 Joules per gram
The heat of vaporization for water at 100°C is about:
2230 Joules per gram
2130 Joules per gram
1230 Joules per gram
334 Joules per gram
Wet clothes dry in sun due to the:
heat capacity
specific heat
evaporation
latent heat
Evaporation causes:
boiling
freezing
fusion
cooling
Volatile liquids have:
low boiling point
high boiling point
low freezing point
high freezing point
The co-efficient of volume expansion of liquids is:
zero
equal to that of solids
greater than solids
less than solids
If 'β' is the coefficient of volume expansion and 'α' is the coefficient of linear expansion than:
β = 2α
β = 3α
α = 2β
α = 3β
It is used to control temperature of ovens, irons water heaters, refrigerators, air conditioners and so on:
Bimetallic thermostat
Rivet
Radiator
Mercury
