NCERT Class 11 MCQ Quiz Hub

1. The word Science originates from the Latin verb Scientia meaning
to know
to see
to experience
to observe

2. Atomic and molecular phenomena are dealt with by
Newtonian Mechanics
fluid Mechanics
applied Mechanics
Quantum Mechanics

3. Wave picture of light failed to explain.
the photoelectric effect
polarization of light
diffraction of light
interference of light

4. Heliocentric theory proposed by Nicolas Copernicus was
replaced by circular orbits to fit the data better
replaced by elliptical orbits to fit the data better
replaced by elliptical orbits to fit the taste of new rulers of Italy
replaced by parabolic orbits to fit the data better

5. Just as a new experiment may suggest an alternative theoretical model, a theoretical advance may suggest what to look for in some for in some experiments. Which of the following experiments can be considered to support this claim?
Davisson and Germer Experiment
experimental discovery of positron
scattering of alpha particle or the gold foil experiment
Michelson Morley experiment

6. The scientific method is
a prescribed method for investigating phenomena, acquiring new knowledge…
A procedure for proposing new hypothesis
a body of techniques for investigating phenomena, acquiring new knowledge…
A method for proposing new theories.

7. A scientific theory
cannot be changed but can be reformulated
mong scientisis fixed once and for all because it is logical
is changed to suit new fashion ats
can be revised if required to fit new phenomenon or data

8. Which of the following is a possible first step in applying the scientific method
Conducting tests
Formulating a hypothesis
Formulation of a question
Building a theory

9. Which of the following is a possible final step in applying the scientific method
Formulating a hypothesis
Building a theory
Analysis of test results
Formulation of a question

10. Physics is a
Applied Science
Mathematical Science
Engineering Science
Natural Science

11. Newtonian mechanics could not explain
fall of bodies on earth
Some of the most basic features of atomic phenomena
movement of planets
flight of rockets

12. Physical quantities are
quantities such as degrees, radians and steradians
quantities such as length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity
quantities such as pounds, dollars and rupees
quantities such as kilos, pounds and gallons

13. Which of the following pairs has the same dimensions?
specific heat and latent heat
lmpulse and momentum
surface tension and force
moment of lnertia and torque

14. The dimensions of kinetic energy is
[M 2L2T]
[ML 2T]
[ML 2T-2]
[ML 2T-1]

15. A force F is given by F = at + bt², where t is time. What are the dimensions of a and b?
MLT-1 and MLT0
MLT-3 and ML2T4
MLT-4 and MLT1
MLT-3 and MLT-4

16. The atmospheric pressure is 106 dyne/cm². What is its value in SI unit?
105 newton/m²
106 newton/m²
104 newton/m²
103 newton/m²

17. In a system of units if force (F), acceleration (A) and time (T) are taken as fundamentals units then the dimensional formula of energy is
FA2T
FAT2
FA2T
FAT

18. If force (F), work (W) and velocity (v) are taken as fundamental quantities. What is the dimensional formula of time (T)?
[WFv]
[WFv-1]
[W-1F -1v]
[WF-1v -1]

19. The dimensions of kinetic energy is same as that of
force
pressure
work
momentum

20. Which of the following groups have different dimensions?
Potential difference, EMF, voltage
Pressure, stress, Youngs modulus
Heat, energy, work done
Dipole moment, electric flux, electric field

21. ML-1T -2 is the dimensional formula of
magnetic induction
self-inductance
electric potential
electric field

22. What is the dimensional formula of magnetic field?
MT-2A-1
MT-1A-2
M-1L-2TA-1
M-1LTA-2

23. Electron volt is a unit of
charge
potential difference
energy
magnetic force

24. The volume of a cube in m³ is equal to the surface area of the cube in m². The volume of the cube is
64 m³
216 m³
512 m³
196 m³

25. In SI system the fundamental units are
meter, kilogram, second, ampere, Kelvin, mole and candela
meter, kilogram, second, coulomb, Kelvin, mole and candela
meter, Newton, second, ampere, Kelvin, mole and candela
meter, kilogram, second, ampere, Kelvin, mole and lux

26. Which one of the following represents the correct dimensions of the coefficient of viscosity?
[ML-1T-2]
[MLT-1]
[ML-1T-1]
[ML-2T-2]

27. A particle starting from the origin (0, 0) moves in a straight line in the (x, y) plane. Its coordinates at a later time are the path of the particle makes with the x-axis an angle of
300
450
600
0

28. Absolute error of the measurement is
the difference between the individual measurement and the true value of the quantity cubed.
the difference between the individual measurement and the true value of the quantit y squared.
the difference between two individual measurements and their mean
the difference between the individual measurement and the true value of the quantity

29. Which of the following units denotes the dimensions [ML2/Q2], where Q represents the electric charge?
Wb/m²
Henry(H)
H/m²
Weber(Wb)

30. The displacement in metres of a body varies with time t in second as y = t2 – t – 2. The displacement is zero for a positive of t equal to
1 s
2 s
3 s
4 s

31. A boy starts from a point A, travels to a point B at a distance of 3 km from A and returns to A. If he takes two hours to do so, his speed is
3 km/h
zero
2 km/h
1.5 km/h

32. A 180 metre long train is moving due north at a speed of 25 m/s. A small bird is flying due south, a little above the train, with a speed of 5 m/s. The time taken by the bird to cross the train is
10 s
12 s
9 s
6 s

33. A boy starts from a point A, travels to a point B at a distance of 1.5 km and returns to A. If he takes one hour to do so, his average velocity is
3 km/h
zero
1.5 km/h
2 km/h

34. A body starts from rest and travels with uniform acceleration on a straight line. If its velocity after making a displacement of 32 m is 8 m/s, its acceleration is
1 m/s²
2 m/s²
3 m/s²
4 m/s²

35. Which one of the following is the unit of velocity?
kilogram
metre
m/s
second

36. A body starts from rest and travels for t second with uniform acceleration of 2 m/s². If the displacement made by it is 16 m, the time of travel t is
4 s
3 s
6 s
8 s

37. The dimensional formula for speed is
T-1
LT-1
L-1T-1
L-1T

38. The dimensional formula for velocity is
[LT]
[LT-1]
[L2T]
[L-1T]

39. A body starts from rest and travels with an acceleration of 2 m/s². After t seconds its velocity is 10 m/s . Then t is
10 s
5 s
20 s
6 s

40. A body starts from rest. If it travels with an acceleration of 2 m/s², its displacement at the end of 3 seconds is
9 m
12 m
16 m
10 m

41. A body starts from rest and travels with uniform acceleration of 2 m/s². If its velocity is v after making a displacement of 9 m, then v is
8 m/s
6 m/s
10 m/s
4 m/s

42. A body starts from rest and travels with an acceleration of 2 m/s². After t seconds its velocity is 10 m/s. Then t is
10 s
5 s
20 s
6 s

43. A body starts from rest and travels for five seconds to make a displacement of 25 m if it has travelled the distance with uniform acceleration a then a is
3 m/s²
4 m/s²
2 m/s²
1 m/s²

44. A boy moves on a circular distance of radius R. Starting from a point A he moves to a point B which is on the other end of the diameter AB. The ratio of the distance travelled to the displacement made by him is
∏/2
∏
2∏
4∏

45. The dimensional formula for acceleration is
[LT2]
[LT?2]
[L2T]
[L2T2]

46. A body starts from rest and travels with uniform acceleration a to make a displacement of 6 m. If its velocity after making the displacement is 6 m/s, then its uniform acceleration a is
6 m/s²
2 m/s²
3 m/s²
4 m/s²

47. The angular velocity depends upon the rate of change of the?
Angular acceleration
Angular Distance.
Angular Displacement
torque

48. A small body attached at the end of an inextensible string completes a vertical circle, then its
angular momentum remains constant
linear momentum remains constant
angular velocity remains constant
total mechanical energy remains constant

49. A cyclist goes round a circular path of circumference 343 m in s. The angle made by him, with the vertical is
440
420
430
450

50. A body makes a displacement of 4 m due East from a point O and then makes displacement of 3 m due North. Its resultant displacement from O
7 m
1 m
5 m
1 . 2 m

51. A body is traveling in a circle at constant speed. It
has an inward acceleration
has constant velocity.
has no acceleration
has an outward radial acceleration

52. When a body P moves on a circular path, the centripetal acceleration is
directed inwards from P, to the centre of the circle
directed tangential to the circumference of the circle, at P
directed perpendicular to the planc of the circle, at P
directed outward, perpendicular to the circumference of the circle

53. A coin kept on a rotating gramophone disc just begins to slip if its centre is at a distance of 8 cm from the centre of the disc. The angular velocity of the gramophone disc is then doubled. Through what distance, the coin should be shifted towards the centre, so that the coin will just slip?
2 cm
6 cm
16 cm
4 cm

54. A can filled with water is revolved in a vertical circle of radius 4 metre and the water does not fall down. The time period of revolution will be
4 sec
10 sec
8 sec
1 sec

55. When angular velocity changes with respect to time then?
an angular acceleration is produced
a linear acceleration is produced
it constitute a couple
a linear velocity is produced

56. The total flight requires a time that is?
four times the time necessary to reach the maximum height.
thrice the time necessary to reach the maximum height
equal to the time necessary to reach the maximum height.
twice the time necessary to reach the maximum height

57. The path followed by a projectile is called its?
Territory
Treasury
Tractor
Trajectory

58. One radian is defined to be the angle subtended where the arc length S is exactly equal to the?
radius of the circle.
diameter of the circle.
circumference of the circle.
half of radius of the circle.

59. A car sometimes overturns while taking a turn. When it overturns, it is
the inner wheel which leaves the ground first
either inner wheel or the outer wheel leaves the ground
both the wheel leave the ground simultaneously
the outer wheel which leaves the ground first

60. A body travels along the circumference of a circle of radius 2 m with a linear velocity of 6 m/s . Then its angular velocity is
6 rad /s
3 rad /s
2 rad / s
4 rad / s

61. The centripetal component of acceleration arises when?
The direction of motion is changed.
The direction propagation is changed.
The direction of gravity is changed
The direction of projectile is changed

62. The word centripetal is derived from two Greek words meaning?
Seeking the situation.
Seeking the centre.
Touching the centre.
Leaving the centre.

63. A car is moving with a speed of 30 m/s on a circular path of radius 500 m. Its speed is increasing at the rate of 2 m/s². The acceleration of the car is
2 m/s²
9.8 m/s ²
1.8 m/2
2.7 m/s²

64. One radian is equal to?
57.7o
53.7o
59.3o
57.3o

65. A body is moving along a circle with an increasing speed. It possesses?
centripetal acceleration only (ac)
tangential acceleration only (ar)
both tangential and centripetal acceleration (ar and ac)
No acceleration

66. The path of a particle is given by the expression y = at + bt², where a and b are constants . Y is the displacement at time t. Its velocity at any instant is given by
a + 2bt
zero
2bt
at

67. The mass of a body which is equal to the ratio of the force acting on a body to the acceleration produced in the body is
the gravitational mass
the electromagnetic mass
the internal mass
the inertial mass

68. A spherical ball of mass 10-6 kg hits a wall 1000 times per second normally with a velocity of 1000 m/s and rebounds with same velocity along the initial direction. The force experienced by the wall is
1 N
4 N
2 N
8 N

69. A machine gun fires a bullet of mass 40 g with a velocity of 1200 ms-1. The man holding it can exert a maximum force on 144 N on the gum. How many bullets can he fire per second at the most?
one
four
two
three

70. A passenger in a moving bus is thrown forward when the bus is suddenly stopped. This is explained
by Newtons first law
by Newtons second law
by Newtons third law
by the principle of conservation of momentum

71. A passenger sitting in a bus moving at uniform speed, feels pushed backward whenever the bus is accelerated forward. This type of force is called
Gravitational force
real force
fictitious force or pseudo force
frictional force

72. A body of mass 5 kg is travelling with a uniform velocity of 2 m/s. Its momentum is
10 kg m/s
7 kg m/s
2 .5 kg m/s
3 kg m/s

73. Inside the nucleus, two protons are held together by a force which overcomes the repulsion. This force is called
gravitational force
electrostatic force
weak force
strong force

74. A block of wood is placed on a surface. A force is applied parallel to the surface to move the body. The frictional force developed acts
normal to the surface upwards
normal to the surface downwards
along the direction of the applied force
opposite to the direction of the applied force

75. A bullet of mass 25 g moving with a velocity of 200 cm/s is stopped within 5 cm of the target. The average resistance offered by the target is
1 N
2 N
3 N
4 N

76. The mass of a body is 2 kg. It weight is
19.6 N
20 N
30 N
40 N

77. A body is sliding down a rough inclined plane which makes an angle of 30 degree with the horizontal. If the coeffcient of friction is 0.26, the acceleration in m/s² is
1.95
2.78
3.47
4.6

78. A gun of mass 1000 kg fires a projectile of mass 1 kg with a horizontal velocity of 100 m/s. The velocity of recoil of the gun in the horizontal direction is
5 m/s
0.1 m/s
15 m/s
20 m/s

79. A block of mass 2 kg rests on a rough inclined plane making an angle of 30 degree with the horizontal. The coefficient of static friction between he block and the plane is 0.7. The frictional force on the block is
9.8 N
0.7 × 9.8 × √3 N
9.8 × √3 N
0.7 × 9.8 N

80. A particle of mass 0.3 kg is subjected to a force F = -kx with k = 15 N/m. What will be its initial acceleration if it is released from a point 20 cm away from the origin?
15 m/s²
3 m/s²
10 m/s²
5 m/s²

81. Two bodies of masses 4 kg and 5 kg are acted upon by the same force. If the acceleration of lighter body is 2 m/s², the acceleration of heavier body is
1 m/s²
1.2 m/s²
1.6 m/s²
1.8 m/s²

82. Out of the basic forces , gravitational force
ranks first in strength
ranks second in strength
ranks third in strength
ranks fourth in strength

83. The frame of reference attached to a satellite of the earth is
an inertial frame
an absolute frame at rest with respect to the stars
a non – inertial frame
a gravitational frame