Temperature can be expressed as derived quantity in terms of
A
length and mass
B
mass and time
C
length, mass and time
D
None of these
Question 2Single Answer
Electron volt is a unit of
A
potential difference
B
charge
C
energy
D
capacity
Question 3Single Answer
Dimensions of impulse are
A
[MLT –1]
B
[MLT²]
C
[MT–2]
D
[ML–1T–3]
Question 4Single Answer
Potential is measured in
A
joule/coulomb
B
watt/coulomb
C
newton–second
D
None of these
Question 5Single Answer
One Nanometer is equal to
A
10–9m
B
10–6m
C
10–10m
D
10–3m
Question 6Single Answer
Maxwell is the unit of
A
magnetic susceptibility
B
intensity of Magnetisation
C
magnetic Flux
D
magnetic Permeability
Question 7Single Answer
Which of the following is derived physical quantity ?
A
Mass
B
Velocity
C
Length
D
Time
Question 8Single Answer
What are the units of magnetic permeability ?
A
Wb A–1 m–1
B
Wb–1 Am
C
Wb A m–1
D
Wb A–1 m
Question 9Single Answer
The dimensions of pressure gradient are
A
[ML–2 T–2]
B
[ML–2 T–1]
C
[ML–1 T–1]
D
[ML–1 T–2]
Question 10Single Answer
The dimensions of Rydberg's constant are
A
[M0L–1T]
B
[MLT–1]
C
[M0 L–1T0]
D
[ML0 T2]
Question 11Single Answer
'Farad' is the unit of
A
resistance
B
conductance
C
capacitance
D
inductance
Question 12Single Answer
S.I. unit of surface tension is
A
degree/cm
B
N/m
C
N/m²
D
Nm
Question 13Single Answer
Which one of the following pairs does not have the same dimension ?
A
Potential energy and Kinetic energy
B
Density and specific gravity
C
Focal length and height
D
Gravitational force and frictional force
Question 14Single Answer
Which one of the following physical quantity has the same unit as that of pressure ?
A
Angular momentum
B
Stress
C
Strain
D
Work
Question 15Single Answer
The symbol of SI unit of inductance is H. It stands for
A
Holm
B
Halogen
C
Henry
D
Hertz
Question 16Single Answer
Light year is a measure of
A
time
B
distance
C
total amount of light falling on the Earth in a year
D
average intensity of light falling on the Earth in a year
Question 17Single Answer
Which one of the following is not a dimension less quantity ?
A
Strain
B
Relative density
C
Frequency
D
Angle
Question 18Single Answer
The dimensions of universal gas constant are
A
[L² M¹ T–2 K–1]
B
[L¹ M² T–2 K–1]
C
[L¹ M¹ T–2 K–1]
D
[L² M² T–2 K–1]
Question 19Single Answer
The dimensions of magnetic moment are
A
[L²A¹]
B
[L²A–1]
C
[L²/A³]
D
[LA²]
Question 20Single Answer
The dimensions of Wien's constant are
A
[ML0TK]
B
[M0LT0K]
C
[M0L0TK]
D
[MLTK]
Question 21Single Answer
The dimensional formula of wave number is
A
[M0L0T–1]
B
[M0L–1T0]
C
[M–1 L–1 T0]
D
[M0 L0 T0]
Question 22Single Answer
The dimensional of Hubble ‘s wave number is
A
[T–1]
B
[M0L0T–2]
C
[MLT4]
D
[MT–1]
Question 23Single Answer
The dimensions of solar constant is
A
[M0L0T0]
B
[MLT–2]
C
[ML²T–2]
D
MT–3
Question 24Single Answer
The dimensional formula for entropy is
A
[MLT–2K¹]
B
[ML2 T-2]
C
[ML²T–2K–1]
D
[ML²T–2K]
Question 25Single Answer
Dimension of specific heat are
A
[ML² T–2 K]
B
[ML² T–2 K–1]
C
[ML²T²K–1]
D
[L²T–2K–2]
Question 26Single Answer
The physical quantity which has the dimensional formula [M¹T–3] is
A
surface tension
B
solar constant
C
density
D
compressibility
Question 27Single Answer
Which one of the following elements is used as a timekeeper in atomic clocks ?
A
Potassium
B
Caesium
C
Calcium
D
Magnesium
Question 28Single Answer
Which one of the following is the value of one nanometer ?
A
10–7 cm
B
10–6 cm
C
10–4 cm
D
10–3 cm
Question 29Single Answer
What is the unit of pressure ?
A
Newton/sq. meter
B
Newton–meter
C
Newton
D
Newton/meter
Question 30Single Answer
The unit of pressure is
A
kg/cm²
B
kg/cm
C
kg/mm
D
kg/cm3
Question 31Single Answer
Which one of the following quantities doe not have unit ?
A
Stress
B
Force
C
Strain
D
Pressure
Question 32Single Answer
Dimensional formula for thermal conductivity is here K denotes the temperature:
A
MLT–2K
B
MLT–2K–2
C
MLT–3K
D
MLT–3K–1
Question 33Single Answer
Which of the following is the unit of molar gas constant ?
A
JK–1 mol–1
B
Joule
C
JK–1
D
J mol–1
Question 34Single Answer
Density of liquid is 16.8 g cm–3. Its value in the International System of Units is
A
16.8 kgm–3
B
168 kgm–3
C
1680 kgm–3
D
16800 kgm–3
Question 35Single Answer
The dimensional formula of couple is
A
[ML² T–2]
B
[MLT²]
C
[ML–1T–3]
D
[ML–2T–2]
Question 36Single Answer
Subtract 0.2 J from 7.26 J and express the result with correct number of significant figures.
A
7.1 J
B
7.06 J
C
7.0 J
D
7 J
Question 37Single Answer
Multiply 107.88 by 0610 and express the result with correct number of significant figures.
A
65.8068
B
65.807
C
65.81
D
65.8
Question 38Single Answer
When 97.52 is divided by 2.54, the correct result is
A
38.3937
B
38.394
C
38.39
D
38.4
Question 39Single Answer
Which of the following is the most accurate ?
A
200.0m
B
20 × 10¹ m
C
2×10²m
D
data is inadequate
Question 40Single Answer
The area of a square is 5.29 cm². The area of 7 such square taking into account the significant figures is:
A
37cm²
B
37.030 cm²
C
37.03 cm²
D
37.0 cm²
Question 41Single Answer
The SI unit of coeffient of mutual inductance of a coil is
A
henry
B
volt
C
farad
D
weber
Question 42Single Answer
The S.I. unit of pole strength is
A
Am²
B
Am
C
Am–1
D
Am–2
Question 43Single Answer
Which is dimensionless ?
A
Force/acceleration
B
Velocity/accerleration
C
Volume/area
D
Energy/work
Question 44Single Answer
The expression [ML–1T–2] does not represent
A
pressure
B
power
C
Stress
D
Young's modulus
Question 45Single Answer
The dimensional formul of current density is
A
[M0L–2T–1Q]
B
[M0L2T1Q–1]
C
[MLT–1Q]
D
[ML–2T–1Q²]
Question 46Single Answer
Match the List – I with List – II
List - I List - II
(Units) (Physical quantity)
A. Watt 1. Electric charge
B. Tesla 2. Power
C. Coulomb 3. Luminous intensity
D. Candela 4. Magnetic field
Select the correct answer from the codes given below :
A
A B C D
1 4 1 3
B
1 2 3 4
C
1 2 4 3
D
2 4 3 1
Question 47Single Answer
Match the List – I with List – II
List - I List - II
(Physical quantity) (Units)
A. Power 1. kg ms–1
B. Energy 2. kg m²s–1
C. Momentum 3. Nm–2
D. Pressure 4. kW
5. kWh
Select the correct answer from the codes given below :
A
A B C D
4 5 1 3
B
4 5 1 2
C
5 4 1 2
D
5 4 2 3
Question 48Single Answer
What is the correct sequence in which the lengths of the following units increase ?
(1) Angstrom
(2) Micron
(3) Nanometer
Select the correct answer from the codes given below :
A
1, 2, 3
B
3, 1, 2
C
1, 3, 2
D
2, 3, 1
Question 49Single Answer
Match the List – I with List – II
List - I List - II
(Physical quantitiy) (Units)
A. Density 1. [MLT–2]
B. Force 2. [ML–3]
C. Energy 3. [MLT–1]
D. Momentum 4. [ML2T–2]
Select the correct answer from the codes given below :
A
A B C D
3 2 4 1
B
1 2 3 4
C
2 1 4 3
D
3 2 1 4
Question 50Single Answer
Match the List – I with List – II
List - I List - II
(Physical quanitity) (Units)
A. Solid angle 1. pascal
B. Impulse 2. Steradian
C. Viscosity 3. Newton–second
D. Pressure 4. Pascal–second
Select the correct answer from the codes given below :
A
A B C D
2 4 3 1
B
2 3 4 1
C
1 4 3 2
D
1 3 4 2
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Physics
Question 51Single Answer
Which of the following is most accurate ?
A
A screw gauge of least count 0.001 mm
B
A screw gauge having pitch 1 mm and 50 divisions on circular scale
C
A vernier callipers of least count 0.01 mm
D
Vernier callipers having 20 divisions on the sliding scale (vernier scale) coinciding 19 divisions on the main millimetre scale
Question 52Single Answer
Which of the following quantities has a unit but dimensionless ?
A
Strain
B
Reynolds number
C
Angular displacemet
D
Poisson's ratio
Question 53Single Answer
The displacement of a body at a particular second n is given by the expression The dimensional formula of Snth in this equation is
A
[M¹L0T¹]
B
[M0L1T0]
C
[M0L¹T–1]
D
[M0L0T0]
Question 54Single Answer
The division of energy by time is X. The dimensional formula ofX is same as that of
A
momentum
B
power
C
torque
D
electric field
Question 55Single Answer
The dimensions of electromotive force in terms of correntA are
A
[MT-2 A-2]
B
[ML2T-2 A2]
C
[ML2T-2 A -2]
D
[ML2T3 A-1]
Question 56Single Answer
[MLT-1] + [MLT-1] = ………………
A
[M0L0T0]
B
[MLT-1]
C
2[MLT-1]
D
None of these
Question 57Single Answer
Which physical quantities have same dimensions ?
A
Moment of couple and work
B
Force and power
C
Latent heat and specific heat
D
Work in power
Question 58Single Answer
life is charge, V the potential difference, T the temperature, then the units of are the same as that of
A
planck’s constant
B
stefan’s constant
C
Boltzmann constant
D
gravitational constant
Question 59Single Answer
in the eqn. (V - b) = constant, the unit of a is
A
dyne × cm5
B
dyne × cm4
C
dyne × cm3
D
dyne × cm2
Question 60Single Answer
The least count of an instrument is 0.01 cm. Which of the following reding denotes the one, measured by this instrument ?
A
1.04 cm
B
2.001 cm
C
3.1 cm
D
None of these
Question 61Single Answer
Match the List – I and List – II
List – I List – II
A. Wavelength 1. Herze
B. Energy 2. Angstrom
C. Intensity of sound 3. Joule
D. Frequency 4. Decibel
Select the correct answer from the codes given below :
A
A B C D
2 3 4 1
B
1 2 3 4
C
2 3 1 4
D
2 1 3 4
Question 62Single Answer
Match the List – I and List – II
List – I List – II
A. Temperature 1. Kelvin
B.Power 2. Watt
C.Pressure 3. Pascal
D.Force 4. Newton
Select the correct answer from the codes given below :
A
A B C D
2 1 3 4
B
1 2 4 3
C
1 2 3 4
D
2 1 4 3
Question 63Single Answer
Match the List – I and List – II
List – I List – II
Acceleration 1. Joule
Electric current 2. Newton second
Work done 3. Ampere
Impulse 4. Metre per sec2
Select the correct answer from the codes given below :
A
A B C D
1 2 3 4
B
2 3 4 1
C
4 3 1 2
D
3 4 1 2
Question 64Single Answer
Which one of the following statements is correct ?
A
The measurement of mass taken by a spring weighing balance is correct at the place where the spring balance is calibrated for
B
The mesurment of mass taken by a spring weighing balance is correct at the all places
C
The measurement of mass taken by a spring weighing balance is correct at the place where the acceleration due to gravity is same with the place where the spring balance is calibrated for
D
A sping balance cannot be used to mesure mass at any place
Question 65Single Answer
Which one of the following statements is not correct ?
A
The SI unit charge is ampere – second
B
Debye is the unit of dipole moment
C
Resistvity of a wire of length / and area of crosssection a depends upon both / and a
D
The kinetic energy of an length of mass in kg and charge / coulomb when accelerated through a potential difference of V volt, is joule
Question 66Single Answer
If a body is moving at constant speed in a circular path, its
A
velocity is constant and its acceleration is zero
B
velocity and acceleration are both changing direction only
C
velocity and accleration are both increaing
D
velocity is constant and acceleration is changing direction
Question 67Single Answer
A graph is plotted showing the velocity of a car as a function of time. If the graph is a straight line, it means that
A
the car started at rest
B
acceleration was constant
C
acceleration was increasing
D
velocity was constant
Question 68Single Answer
If a car is traveling north on a straight road and its brakes are applied, it will
A
have no acceleration
B
accelerate to the south
C
accelerate to the north
D
accelerate either east or west
Question 69Single Answer
An object moves with a uniform velocity when
A
the forces acting on the object are balanced
B
there is no external force on it
C
Both of (a) and (b)
D
Either (a) or (b)
Question 70Single Answer
The acceleration of a car that speeds up from 12 meters per second to 30 meters per second in 15 seconds
A
2.4 m/s²
B
1.2 m/s²
C
2 m/s²
D
5.2 m/s²
Question 71Single Answer
A particle experiences constant acceleration for 20 seconds after starting from rest. If it travels a distances s1 in the first 10 seconds and distances s2 in the next 10 seconds, then
A
s2 = s1
B
s2 = 2s1
C
s2 = 3s1
D
s2 = 4s1
Question 72Single Answer
Motion of an object is the change in position with respect to a reference point known as
A
Origin
B
initial position
C
final position
D
distance
Question 73Single Answer
Displacement is the
A
shortest distance between initial and final position
B
the actual distance between initial and final positions
C
the distance travelled by the object
D
distance traveled by the object in a unit time
Question 74Single Answer
An object has traveled 10 km is 15 minutes, its displacement will be
A
10 km
B
Can be zero
C
More than 10 km
D
All of the Above
Question 75Single Answer
If an object covers equal distances in equal intervals of time, it is said to be in
A
Circular Motion
B
Uniform Motion
C
Oscillatory Motion
D
Non– uniform Motion
Question 76Single Answer
Average velocity of an object is obtained by.
A
Dividing the total distance traveled b the total time taken
B
Half of the sum of the initial velocity and the final velocity
C
Both (a) and (b)
D
None of the above
Question 77Single Answer
Negative value of acceleration signifies.
A
The velocity is increasing
B
The velocity is decreasing
C
The velocity remains the same
D
The object comes to rest
Question 78Single Answer
In distance–time graphs.
A
Distance is taken along the X–axis
B
Time is taken along the Y–axis
C
Straight line indicates uniform motion
D
Straight line indicates non–uniform motion
Question 79Single Answer
In velocity – time graphs.
A
Velocity is taken along the Y–axis and Time is taken along the X–axis
B
Straight line indicates uniform acceleration
C
Straight line parallel to x–axis indicates uniform motion
D
All of the above
Question 80Single Answer
The equation (s) of motion can be represented as.
A
V = u + at
B
C
2as = v² – u²
D
All of these
Question 81Single Answer
A train travels 40 km at a uniform speed of 30 km h–1. Its average speed after traveling another 40 km is 45 km h–1 for the whole journey. Its speed in the second half of the journey is.
A
45 km h–1
B
90 km h–1
C
60 km h–1
D
None of these
Question 82Single Answer
A man walks on a straight road from his home to market 2.5km. away with a speed of 5 km/h. Finding the market closed, he instantly turns and walks back home with a speed of 7.5 km/h. The average speed of the man over the interval of time 0 to 40 min. is equal to –
A
5 km/h
B
25/4 km/h
C
30/4 km/h
D
45/km/h
Question 83Single Answer
A ball is dropped from a window 24 meters high. How long will it take to reach the ground ?
A
2.2 s
B
1.2 s
C
4.5 s
D
0.2s
Question 84Single Answer
Mohan takes 20 minutes to cover a distance of 3.2 kilometers due north on a bicycle, his velocity in kilometer/hour-
A
8.1
B
9.6
C
1.2
D
7.2
Question 85Single Answer
A Pitcher throws his fastball horizontally at 42.1 meters per second. How far does it drop before crossing the plate, 18.3 meters away ?
A
0.8 m
B
1.2m
C
2.2m
D
0.93 m
Question 86Single Answer
Two balls A and B of same masses are thrown from the top of the building. A, thrown upward with velocity V and B, thrown downward with velocity V, then–
A
Velocity of A is more than B at the ground
B
Velocity of B is more than A at the ground
C
Both A and B strike the ground with same velocity
D
None of these
Question 87Single Answer
A ball is released from the top of a tower of height h meters. It takes T seconds to reach the ground. What is the position of the ball in T/3 seconds–
A
h/9 meters from the ground
B
7h/9 meters from the ground
C
8h/9 meters from the ground
D
17h/18 meters from the ground
Question 88Single Answer
When a bus suddenly takes a turn, the passengers are thrown outwards because of-
A
inertia of motion
B
acceleration of motion
C
speed of motion
D
Both (b) and (c)
Question 89Single Answer
A thief snatches a purse and runs due west, going 6.0 meter per second. A policeman, 15 meters to the east, sees the event and gives chase. If the officer is a good sprinter, going at 8.5 meters per second, how far does he have to run to catch the thief.
A
12 m
B
51 m
C
61 m
D
55 m
Question 90Single Answer
A car going at 24 meters per second passes a motorcycle at rest. As it passes, the motorcycle start up, accelerating at 3.2 meters per second squared. If the motorcycle can keep up that acceleration, how long will take for it to catch the car.
A
12 s
B
14s
C
20s
D
18s
Question 91Single Answer
The initial velocity of a body is 15 m/s. If it having an acceleration of 10 m/s², then the velocity of body after 10 seconds from start-
A
110 m/s
B
105 m/s
C
120 m/s
D
115 m/s
Question 92Single Answer
Which of the following can be zero, when a particle is in motion for some time ?
A
Distance
B
Displacement
C
Speed
D
None of these
Question 93Single Answer
The numerical ratio of average velocity to average speed is.
A
always less than one
B
always equal to one
C
always more than one
D
equal to or less than one
Question 94Single Answer
A passenger in a moving train tosses a coin. If the coin falls behind him, the train must be moving with.
A
an acceleration
B
a deceleration
C
a uniform speed
D
any of the above
Question 95Single Answer
A body is imparted motion from rest to move in a straigh line. If it is then obstructed, by an opposite force, then.
A
the body may necessarily change direction
B
the body is sure to slow down
C
the body will necessarily continue to move in the same direction at the same speed
D
None of these
Question 96Single Answer
Which of the following decreases in motion along a straight line with constant retardation while the body is moving away from the origin ?
A
Speed
B
Acceleration
C
Displacement
D
None of these
Question 97Single Answer
Which of the following is not an example of linear motion ?
A
An aeroplane moving on a straight track with increasing speed
B
A body in uniform circular motion
C
Wheel rotating at uniform speed on road
D
A body rolling down an inclines plane
Question 98Single Answer
Which of the following changes when a particle is moving with uniform velocity ?
A
Speed
B
Velocity
C
Acceleration
D
Position vector
Question 99Single Answer
Which one out of the following statement is false ?
A
A body can have zero velocity and still be accelerated
B
A body can have a constant velocity and still have a varying speed
C
A body can have a constant speed and still have a varying velocity
D
The direction of the velocity of a body can change when its acceleration is constant
Question 100Single Answer
What determines the nature of the path followed by the particle.
A
speed
B
velocity
C
acceleration
D
both (b) and (c)
Question 101Single Answer
A body is thrown upwards and reaches its maximum height. At that position.
A
its acceleration is minimum
B
its velocity is zero and its acceleration is also zero
C
its velocity is zero but its acceleration is maximum
D
its velocity is zero and its acceleration is the acceleration due to gravity
Question 102Single Answer
A train is moving towards east and a car is along north, both with same speed. The observed direction of car to the passanger in the train is-
A
east–north direction
B
west–north dircection
C
south–east direction
D
None of these
Question 103Single Answer
The displacement–time graphs of two particles A and B are straight lines making angles of respectively 30° and 60° with the time axis. If the velocity of A is vA and that of B is vB the value of vA/vB is.
A
1/2
B
C
D
1/3
Question 104Single Answer
Figure shows the v–t graph for two particles P and Q. Which of the following statements regarding their relative motion is true ? Their relative velocity is
A
is zero
B
is non–zero but constant
C
continuously decreases
D
continuously increases
Question 105Single Answer
Sound velocity is usually larger in solids than in liquids and gases because :
A
solids are more elastic than liquids and gases
B
solids are less elastic than liquids and gases
C
volumetric expansion coefficients of liquids and gases are higher than solids
D
frequency of sound waves decreases in solids due to Doppler shift
Question 106Single Answer
In which of the following cases, the object does not possess an acceleration or retardation when it moves in.
A
upward direction with decreasing speed
B
downward direction with increasing speed
C
with constant speed along circular path
D
with constant speed along horizontal direction
Question 107Single Answer
The speed of a falling body increases continuously, this is because.
A
no force acts on it
B
it is very light
C
the air exert the frictional force
D
the earth attract it
Question 108Single Answer
If a Candle is make to burn in Zero Gravity__ :
A
The Candle will burn for a very long time compared to normal gravity
B
The flame of the candle will become round
C
There is no impact of gravity on the burning of candle
D
The Candle will not burn in zero gravity
Question 109Single Answer
A jet engine works on the principle of conservation of
A
Linear momentum
B
Angular momentum
C
Energy Mass
D
Mass Velocity
Question 110Single Answer
What is the scale used for measuring the intensity of the earthquake ?
A
Metric Scale
B
Quake Scale
C
Richter Scale
D
Epicentre Scale
Question 111Single Answer
When a motorcar makes a sharp turn at a high speed, we tend to get thrown to one side because.
A
we tend to continue in our straight line motion
B
un unbalanced force is applied by the engine of the motorcar changes the direction of motion of the motorcar
C
we slip to one side of the seat due to the inertia of our body
D
All of these
Question 112Single Answer
Nuclear Reactors are based on which of the following phenomenon ?
A
Magnetic confinement of Plasma
B
Nuclear Fusion
C
Controlled Nuclear Fission
D
None of the above
Question 113Single Answer
Optical Fibre technology works on which of these principles of Physics ?
A
Bernoulli’s Principle
B
Newton’s law of Motion
C
Total internal reflection of Light
D
Photoelectric effect
Question 114Single Answer
If an object experience a net zero unbalanced force, then the body.
A
can be accelerated
B
moves with constant velocity
C
cannot remain at rest
D
None of these
Question 115Single Answer
A cardboard is placed on a glass of water, and a ten paise coin is placed on the cardboard. If the cardboard is flicked suddenly in the direction parallel to its surface, then the cardboard flies away, but the coin falls in the glass .
The behaviour of the coin can be explained by which among the following properties ?
A
Momentum
B
Acceleratio
C
Inertia
D
Friction
Question 116Single Answer
The physical quantity which is the product of mass and velocity of a body is known as.
A
inertia
B
momentum
C
force
D
change in momentum
Question 117Single Answer
Rate of change of momentum of an object is proportion to the.
A
blanced force applied
B
applied unbalanced force in the dirction of the force
C
time during which the force is applied
D
All of these
Question 118Single Answer
A moving object can come to rest only if it.
A
has a frictional force acting only if it
B
has no net force acting on it
C
is completely isolated
D
applies an impulse to something else
Question 119Single Answer
When a body is stationery-
A
There is no forece acting it
B
The force acting on it not in contact with it
C
The combination of forces acting on it balances each other
D
None of above
Question 120Single Answer
A rider on horse falls back when horse starts running , all of a sudden because.
A
rider is taken back
B
rider is suddenly afraid of falling
C
inertia of rest keeps the upper part of body at rest while lower part of the body moves forward with the horse
D
None of above
Question 121Single Answer
Echoes are heard when we shout in an empty hall. But when the hall is full of people no echoes are heard why ?
A
Echoes are subdued in the noise of people
B
Soft clothes of people absorb sound instead of reflecting it
C
Destructive interference of sound takes place
D
Excessive reverberations take place
Question 122Single Answer
Swimming is possible on account of.
A
first low of motion
B
second low of motion
C
third low of motion
D
newton’slow of motion
Question 123Single Answer
A parrot is sitting on the floor of a closed glass cage which is in a boy’s hand. If the parrot starts flying with a contant speed, the boy will feel the weight of the cage as.
A
unchanged
B
reduced
C
inceased
D
nothing can be said
Question 124Single Answer
A man is at rest in the middle of a pond on perfectly smooth ice. He can get himself to the shore by making use of Newton’s.
A
first low
B
second low
C
third law
D
all the laws
Question 125Single Answer
A cannon after firing recoils due to -
A
conservation of energy
B
backward thrurd of gases produced
C
Neton’s third law motion
D
Newton’s first low of mation
Question 126Single Answer
Neton’s third low of motion leads in the low conservation of-
A
angular momentum
B
energy
C
mass
D
momentum
Question 127Single Answer
The force of friction acting on a car on different roads in the increasing order of magnitude will be.
A
mud, tar concrete and gravel roads
B
tar, concrete, gravel and roads
C
concrete, mud, tar and concrete roads
D
gravel, mud, tar and concrete roads
Question 128Single Answer
Which of the following makes a CD or DVD show rainbow pattern ?
A
Diffraction of the Light
B
Thin-Film Interference of the light
C
Scattering of the light
D
Polarisation of the light
Question 129Single Answer
When a bus suddenly takes a turn, the passengers are thrown outwords because of-
A
inertia of motion
B
acceleration of motion
C
speed of motion
D
Both (b) and (c)
Question 130Single Answer
A ball is thriwn vertically upward form the ground with a speed of 25.2 m/s. The ball will reach the highest point of its journey in.
A
5.14 s
B
3.57 s
C
2.57 s
D
129 s
Question 131Single Answer
If the distance S covered by a moving car in rectilinear motion with a speed v in time t is given by S = vt then the car undergoes.
A
a uniform acceleration
B
a non – uniform accleration
C
a uniform velocity
D
a non uniform velocity
Question 132Single Answer
An automobile travelling with a speed of 60 km/h, can apply brake to stop within a distance of 20m If the car is going twice as fast i.e 120 km/h, the stopping distance will be.
A
60 m
B
40 m
C
20 m
D
80 m
Question 133Single Answer
A stone thrown vertically upwards with a speed of 5 m/sec attains a height H1 Another stone thrown upwards from H2 The correct relation between H1 and H2 is.
A
H1 = 4H2
B
H2 = 3H2
C
H1 = 2H2
D
H1 = H2
Question 134Single Answer
A food packet is released form a helicopter rising steadity at the speed of 2m/sec. After 2 secounds the velocity of the packet is (g = 10 m/sec2).
A
22 m/sec
B
20 m/sec
C
18 m/sec
D
None of these
Question 135Single Answer
A stone thrown upward with a speed u from the top of the tower reaches the ground with a velocity 3u The height of the tower is.
A
3u2/g
B
4u2/g
C
6u2/g
D
9u2/g
Question 136Single Answer
A ball is dropped downwards, after 1 sec another ball is dropped downwards from the same point What is the distance between them after 3 sec ?
A
25 m
B
20 m
C
50 m
D
9.8 m
Question 137Single Answer
A stone is thrown vertically upwards When the particle is at a height half of its maximum height its 10 m/sec, then maximum height attain by partical is (g = 10m/sec2).
A
8 m
B
10 m
C
15 m
D
20 m
Question 138Single Answer
A body released from the top of a tower falls through half the height of the lower in 2 s In what time shall the body fall through the height of the tower ?
A
4 s
B
3.26 s
C
3.48 s
D
2.828
Question 139Single Answer
A body travels 2m in the frist two second 2. 20m in the next 4 second with uniform deceleration The velocity of the body at the end of 9 second is.
A
– 10 ms- 1
B
– 0.20 ms- 1
C
– 0.40 ms- 1
D
– 0.80 ms- 1
Question 140Single Answer
from a 200m tower one ball is thrown upwards with speed of 10 ms- 1 and another is thrown vertically downwards at the same simultaneously The time difference of their reaching the ground will be nearest to.
A
12 s
B
6 s
C
2 s
D
1 s
Question 141Single Answer
A car travels from A to B at a speed of 20 km h-1 and returns at a speed of 30km h-1 and returen at a speed of 30 km h-1 The averge speed of the car for the whole journey is.
A
5 km h- 1
B
24 km h- 1
C
25 km h- 1
D
50 km h- 1
Question 142Single Answer
A man leavels his house for a cycle ride He comes back to his house after half – an – hour after covering a distance of one km What is his average velocity for the ride ?
A
zero
B
2 km h- 1
C
10 km h- 1
D
Question 143Single Answer
A boy moving with a velocity 20 km h- 1 along a straight line joining two stationery objects According to him both objects.
A
move in the same direction with same speed of 20 km h- 1
B
move in different direction with the same speed of 20 km h- 1
C
move towards him
D
remain statioary
Question 144Single Answer
If you were to throw a ball vertically upward with an initial velocity of 50 m/s approximately how long would it take for the ball to return to your hand ? Assume air resistance is negligible ?
A
2.5 s
B
5.0 s
C
7.5 s
D
10 s
Question 145Single Answer
Two trains are each 50 m long moveing parallel towards each othere at speeds 10 m/s 15 m/s respectively After what time will they pass each other ?
A
B
4 sec
C
2 sec
D
6 sec
Question 146Single Answer
A passenger travels along the straight road for half the distance with velocity v1 and the remaining half distance with velocity v2. Then averge velocity is given by.
A
v1 v2
B
v22/ v12
C
(v1 + v2)/2
D
2 v1 v2/ (v1 + v2)
Question 147Single Answer
A bullet is fired vertically up from a 400 m tall tower with a speed m/s Ifg is taken as 10 m/ s2 , the taken by the bullet to reach the ground will be.
A
8 s
B
16 s
C
20 s
D
24 s
Question 148Single Answer
An object is moving with uniform acceleration a Its initial velocity is u and after time t its velocity is v The equation of its motion is v =u+ at The velocity (along y - axis) time (along x axis) graph shall be a straight line.
A
passing through origin
B
with x – intercept u
C
with y – intercept u
D
with slope u
Question 149Single Answer
A boy throws four stones of same shape size and weight with equal speed at different initial angles with the hori zontal line If the angles are.
A
15o
B
30o
C
45o
D
60o
Question 150Single Answer
The motion of a car along a straight path is shown by the following figure :
The car starts O and reches at A , B and C different instants of time During its motion from O to C and back to B, the distance coerved and magnitude of the displace-
are the same as that of
(V - b) = constant, the unit of a is
