Physics MCQs for Practice

Physics MCQ Question Answers for Various Entrance Exams

Physics MCQs– Practice the Physics MCQs suitable for various Entrance Exams including CUET. Learn and practice Physics questions and answers. Physics MCQ questions are very helpful for various competitive exams. CUET is a Common University Entrance Test that is now mandatory to take admission to Central Universities in India. Physics MCQ questions are based on the latest CUET exam pattern 2022 and other entrance exams, so that you can have a fair idea about exam trends that will be followed for various entrance exams.

1. For a particle moving along a circular path with a constant speed, the acceleration is constant in:

a.neither magnitude nor direction

b.both magnitude and direction

c.direction

d.magnitude

2. To convert a galvanometer into an ammeter, we should connect:

a.a low resistance in parallel with it

b.a high resistance in parallel with it

c.a low resistance in series with it

d.a high resistance in series with it

3. A proton moving in a straight line enters a strong magnetic field along the field direction. How will its path and velocity change?

a.Path is same but motion is retarded

b.Path is circular but speed constant

c.Path is same but velocity increase

d.Path is same and velocity remains constant

4. Two wires of the same material and length are stretched by the same force. Their masses are in the ratio 3:2, their elongations are in the ratio:

a.4:9

b.2:3

c.9:4

d.3:2

5. The reactance of an inductor connected with DC voltage is:

a.none of these

b.zero

c.1Ω

d.infinity

6. In the case of SHM, if the particle is at the mean position, then the particle is in:

a.neutral equilibrium

b.unstable equilibrium

c.none of these

d.stable equilibrium

7. Ray optics fails when the size of the obstacle is:

a.less than the wavelength of light

b.A and B both

c.3 cm

d.5 cm

8. The speed of a particle moving in a circle is increasing. The dot product of its acceleration and velocity is:

a.may be +ve or –ve

b.negative

c.positive

d.zero

9. If there were a smaller gravitational effect, which of the following forces do you think would alter in some respect?

a.Viscous force

b.Archimedes uplift

c.Electrostatic force

d.Nuclear force

10. When the body is moving up, the acceleration due to gravity will be:

a.sideways

b.upward

c.nil

d.downward

11. When we apply reverse bias to a junction diode, it:

a.raises the potential barrier

b.greatly increases the majority carrier current

c.greatly increases the minority carrier current

d.lowers the potential barrier

12. Two vessels having equal volume contain molecular hydrogen at one atmosphere and helium at two atmospheres respectively. If both samples are at the same temperature the mean velocity of hydrogen molecules is:

a.equal to that of helium

b.twice that of helium

c.√2 times that of helium

d.half that of helium

13. Which one of the following is not the advantage of semiconductor device in the electron tubes?

a.Unlimited life

b.Low consumption of power for cathode heating

c.Greater efficiency

d.No warming up time for switching

14. If a metal wire of length L, having area of cross-section A and Youngs modulus Y, behaves as a spring of spring constant k. The value of k is:

a.YA/2L

b.2YA/L

c.YL/A

d.YA/L

15. A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2. The weight of the block is:

a.20N

b.100N

c.2N

d.50N

16. A point source generates 10 J of light energy in 2 s. The luminous flux of source is:

a.50 lumen

b.none of these

c.10 lumen

d.5 lumen

17. When p-n junction diode is forward biased, then:

a.both the depletion region and barrier height are reduced

b.the depletion region is widened and barrier height is reduced

c.the depletion region is reduced and barrier height is increased

d.both the depletion region and barrier height are increased

18. As a bubble comes from the bottom of a lake to the top, its radius:

a.becomes zero

b.does not change

c.decreases

d.increases

19. The pressure at the bottom of a tank of liquid is not proportional to:

a.the height of the liquid

b.the area of the liquid surface

c.the acceleration

d.the density of the liquid

20. The time period of a charged particle undergoing a circular motion in a uniform magnetic field is independent of its:

a.speed

b.charge

c.magnetic induction

d.mass

21. The minimum velocity (in m/s) with which a car driver must traverse a flat curve of radius 150 m and coefficient of friction 0.6 to avoid skidding is:

a.60 m/s

b.25 m/s

c.15 m/s

d.30 m/s

22. If a current is passed through a spring then the spring will:

a.compress

b.expand

c.none of these

d.remain same

23. A p-n junction diode is reverse biased. The resistance measured by an ohmmeter connected across it will be:

a.zero

b.low

c.high

d.infinite

24. A light spring balance hangs from the hook of the other light spring balance and a block of mass M kg hangs from the former one. Then the true statement about the scale reading is:

a.both the scales read M kg each

b.both the scales read M/2 kg

c.the reading of the two scales can be anything but the sum of the reading will be M kg

d.the scale of the lower one reads M kg and of the upper one zero

25. If the time-displacement graph of a particle is parallel to the time-axis, the velocity of particle is:

a.zero

b.variable

c.equal to its acceleration numerically

d.infinity

26. If the mass of bob of simple pendulum is increased by 50%, the time period of the pendulum:

a.decreases

b.none of these

c.does not change

d.increases

27. In a watch the average angular velocity is maximum for the tip of:

a.hours hand

b.minutes hand

c.seconds hand

d.equal for all hands

28. Which of the following substances has the highest value of the Youngs modulus?

a.Steel

b.Wood

c.Rubber

d.Plastic

29. Which of the following statements is false for a particle moving in a circle with a constant angular speed?

a.The acceleration vector points to the centre of the circle

b.The velocity and acceleration vectors are perpendicular to each other

c.The velocity vector is tangent to the circle

d.The acceleration vector is tangent to the circle

30. A passenger in a moving train tosses a coin. If the coin falls behind him, the train must be moving with:

a.any of these

b.a deceleration

c.an acceleration

d.an uniform speed

31. A current loop placed in a magnetic field behaves like a:

a.magnetic substance

b.magnetic pole

c.magnetic dipole

d.all are true

32. When a simple pendulum is rotated in a vertical plane with constant angular velocity, centripetal force is:

a.zero

b.maximum at highest point

c.maximum at lowest point

d.same at all points

33. The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the difference in the:

a.type of bonding

b.crystal structure

c.variation of the number of charge carriers with temperature

d.variation of scattering mechanism with temperature

34. Mark correct option.

a.The negative change in potential energy is equal to work done

b.Mechanical energy of a system remains constant

c.None of the above

d.If internal forces are non-conservative, the net work done by internal forces must be zero

35. The sensitivity of a potentiometer can be increased by:

a.all the above methods

b.increasing the length of potentiometer wire

c.decreasing the length of potentiometer wire

d.increasing the emf of the cell used in primary circuit

36. The core of any transformer is laminated so as to:

a.reduce the energy loss due to eddy currents

b.make it robust and strong

c.increase the secondary voltage

d.make it light weight

37. Two pure inductor coils of self-inductance L each are connected in series, the net inductance is:

a.L/2

b.L

c.L/4

d.2L

38. In L-R circuit, the time constant is given by:

a.1/LR

b.R/L

c.L/R

d.LR

39. For a perfect gas if:

a.T is given P is uniquely determined

b.T is given P and V both are uniquely determined

c.T is given V is uniquely determined

d.P and V are given T is uniquely determined

40. A bullet fired into a fixed target loses half of its velocity after penetrating 3 cm. How much further it will penetrate before coming to rest, assuming that it faces constant resistance to motion?

a.1.0 cm

b.1.5 cm

c.3.0 cm

d.2.0 cm

41. A train runs past a telegraph pole in 15 second, and through a tunnel 450 metre long in 45 s. The length of the train is

a.325 m

b.225 m

c.450 m

d.425 m

42. Which of the following statements about the centripetal and centrifugal forces is correct?

a.Centripetal force balances the centrifugal force

b.Both centripetal force and centrifugal force act on the same body

c.Centripetal force is directed opposite to the centrifugal force

d.Centripetal force is experienced by the observer at the centre of the circular path described by the body

43. A particle of mass 10 kg is executing SHM of time period 2 s and amplitude 0.25 m. The magnitude of maximum force on the particle is:

a.24.65 N

b.5 N

c.40.6 N

d.zero

44. A lorry and a car, moving with the same KE are brought to rest by applying the same retarding force then:

a.car will come to rest in a shorter distance

b.both will come to rest in the same distance

c.none of the above

d.lorry will come to rest in a shorter distance

45. An object fall from rest. In the last second of its fall, it covers half of the total distance. If g = 9.8 m s-2 then the total height of the fall is

a.19.6 m

b.50 m

c.78.4 m

d.57 m

46. In each heart beat, a heart pump 80 ml of blood at an average pressure of 100 mm of Hg. What will be the power output of the heart? (Assume 60 heart beats per minute)

a.1W

b.0.5W

c.1.06W

d.2.75W

47. The time period of a simple pendulum at the centre of earth is:

a.less than zero

b.none of these

c.zero

d.infinite

48. In an equilateral triangle ABC, AL, BM and CN are the medians . Which of the following would correctly represent the resultant of two forces represented
by BC and BA ?

a.2BM

b.AC

c.2AL

d.2CN

49. A body weighs 5 N in air and 2 N when immersed in a liquid. The buoyant force is:

a.2 N

b.3 N

c.5 N

d.7 N

50. Which of the following phenomena can be used to analyse a beam of light into its component wavelength?

a.Reflection

b.Refraction

c.Polarisation

d.Interference

51. Which one of the following can produce maximum induced emf?

a.100 A DC

b.50 A 50 Hz AC

c.50 A 500 Hz AC

d.50 A DC

52. A stone of mass 0.3 kg attached to a 1.5 m long string is whirled around in a horizontal circle at a speed of 6 m/s. The tension in the string is:

a.none of these

b.20N

c.7.2N

d.10N

53. If in a cinema hall, the distance between the projector and the screen is increased by 2%, keeping everything else unchanged, then the intensity of illumination on the screen is:

a.increased by 2%

b.decreased by 2%

c.increased by 4%

d.decreased by 4%

54. Two charged particles each of mass m and charge q are projected in a uniform magnetic field B with the same speed as such planes of motion of particles are perpendicular to magnetic field B, then:

a.the kinetic energies of particles are same to each other

b.all of the above

c.the magnetic forces on them are same to each other

d.they move on circular path of same radii

55. Two resistances are connected in parallel and a current is sent through the combination. The current divides itself:

a.equally in both the resistances

b.in none of the above manner

c.in the inverse ratio of resistances

d.in the direct ratio of resistances

56. An alloy is prepared by mixing equal volume of two metals. The specific gravity of alloy is 4. But when equal masses of two same metals are mixed together, the specific gravity of alloy is 3. The specific gravity of each metal is:

a.2, 4

b.6, 4

c.4, 8

d.6, 2

57. A positive charge is moving upwards in a magnetic field which is towards north. The particle will be deflected towards:

a.west

b.north

c.south

d.east

58. A mass M is suspended from a spring of negligible mass. The spring is pulled a little and then released, so that the mass executes SHM of time period T. If the mass is increased by m, the time period becomes 5T/3. Then the ratio of m/M is:

a.5/3

b.16/9

c.25/9

d.3/5

59. Two cells of 1.25 V and 0.75 V are connected in parallel. The effective voltage is:

a.2 V

b.1.25 V

c.0.5 V

d.0.75 V

60. Youngs modulus for perfectly inelastic body is:

a.infinity

b.zero

c.finite

d.one

61. In which of the following cases the potential energy is defined?

a.Both conservative and non-conservative forces

b.Conservative force only

c.Non-conservative force only

d.Neither conservative nor non-conservative forces

62. Which of the following is/are not conservative force?

a.Frictional force

b.All of the above

c.Electrostatic force in the coulomb field

d.Gravitational force

63. In simple harmonic motion, the particle is:

a.alternately accelerated and retarded

b.neither accelerated nor retarded

c.always accelerated

d.always retarded

64. Convergence of concave mirror can be decreased by dipping in:

a.oil

b.none of these

c.water

d.both A and B

65. If a system undergoes contraction of volume, then the work done by the system is:

a.negative

b.positive

c.negligible

d.zero

66. Significant motion for the molecules of a monoatomic gas corresponds to:

a.vibratory

b.translatory

c.none of these

d.rotatory

67. When a satellite going round the earth in a circular orbit of radius r and speed v loses some of its energy, then r and v change as:

a.r will decrease and v will increase

b.r and v both will decrease

c.r will increase and v will decrease

d.r and v both will increase

68. A man walks 4 m towards East and then 3 m towards North and there he fixes a pole 12 m high. The distance between the starting point and tip of the pole in space is

a.19 m

b.11 m

c.7 m

d.13 m

69. Two parallel wires carrying current in the same direction attract each other because of:

a.magnetic forces between them

b.potential difference between them

c.mutual inductance between them

d.electric forces between them

70. A 50 mH coil carries a current of 2 A, the energy stored in joule is:

a.1

b.0.5

c.0.05

d.0.1

71. For gases:

a.isothermal elasticity is greater than adiabatic elasticity

b.adiabatic elasticity is greater than isothermal elasticity

c.none of the above

d.both the elasticities are equal

72. A stone falls freely from rest and the total distance covered by it in the last second of its motion equals the distance covered by it in the first three second of its motion. The stone remains in air for

a.5 s

b.6 s

c.7 s

d.4 s

73. The maximum velocity of a particle, executing simple harmonic motion with an amplitude 7 mm, is 4.4 m/s. the period of oscillation is:

a.10 s

b.100 s

c.0.01 s

d.0.1 s

74. A projectile is projected at an angle 60 degree with horizontal with speed 10 m/s. The minimum radius of curvature of the trajectory described by the projectile is:

a.10 m

b.2.55 m

c.2 m

d.none of these

75. A virtual image larger than the object can be obtained by:

a.concave mirror

b.plane mirror

c.concave lens

d.convex mirror

76. A particle moves along y-axis according to equation y = 3 + 4 cos wt. The motion of particle is:

a.not SHM

b.none of the above

c.oscillatory but not SHM

d.SHM

77. If the distance between the two particles is increased by 2%, then the force of attraction between them will:

a.decrease by 6%

b.increase by 6%

c.decrease by 4%

d.increase by 4%

78. The time period of an earths satellite in circular orbit is independent of:

a.radius of its orbit

b.both the mass and radius of the orbit

c.the mass of the satellite

d.neither the mass of the satellite nor the radius of its orbit

79. The internal energy U is a unique function of any state because change in U:

a.corresponds to an adiabatic process

b.depend upon path

c.does not depend upon path

d.corresponds to an isothermal process

80. Calculate the velocity of image with respect to observer if an observer is walking away from the plane mirror with 6 m/s.

a.6 m/s

b.3 m/s

c.-6 m/s

d.12 m/s

81. If Youngs double slit experiment, is performed in water:

a.the fringe width will increase

b.there will be no fringe

c.the fringe width will remain unchanged

d.the fringe width will decrease

82. Two bodies have same mass and speed, then:

a.the ratio of their magnitudes of momentum is one

b.their momentums are same

c.both B and C are correct

d.the ratio of momentums is not determined

83. If a body loses half of its velocity on penetrating 3 cm in a wooden block, then how much will it penetrate more before coming to rest?

a.1cm

b.4cm

c.3cm

d.2cm

84. The most efficient heat engine is one which is:

a.irreversible

b.reversible

c.none of the above

d.driven by high speed diesel

85. A wire of resistance R is stretched so that its length increases by 10%. The resistance of the wire increases by:

a.21%

b.28%

c.11%

d.15%

86. Which of the following quantities is not carried by light?

a.None of the above

b.Energy

c.Linear momentum

d.Angular momentum

87. In an interference pattern the position of zeroth order maxima is 4.8 mm from a certain point P on the screen. The fringe width is 0.2 mm. The position of second maxima from point P is:

a.5.2 mm

b.40 mm

c.5 mm

d.5.1 mm

88. The time period of artificial satellite in a circular orbit of radius R is T. The radius of the orbit in which time period is 8T is:

a.3R

b.2R

c.5R

d.4R

89. The focal length of convex mirror is 20 cm, its radius of curvature will be:

a.40 cm

b.10 cm

c.20 cm

d.30 cm

90. In a common-base mode of transistor, the collector current is 5.488 mA for an emitter current of 5.60 mA. The value of the base current amplification factor (β) will be:

a.48

b.50

c.51

d.49

91. A cut diamond sparkles because of its:

a.emission of light by the diamond

b.hardness

c.high refractive index

d.absorption of light by the diamond

92. In the case of SHM, at the time of maximum kinetic energy:

a.potential energy must not be zero

b.potential energy must be zero

c.potential energy is minimum

d.potential energy is maximum

93. The size of the image, if an object of 2.5m height is placed at a distance of 10 cm from a concave mirror is: (Take radius of curvature of concave mirror = 30 cm)

a.5.6 m

b.7.5 m

c.10.5 m

d.9.2 m

94. We write the relation for Boyles law in the form PV = C, when the temperature remains constant. In this relation the magnitude of C depends upon:

a.the nature of the gas used in the experiment

b.the atmospheric pressure

c.the magnitude of g in the laboratory

d.the quantity of the gas enclosed

95. An iron ball is weighed in air and then in water by a spring balance:

a.its weight in water is more than in air

b.its weight in air is more than in water

c.its weight is same both in air and water

d.its weight is zero in water

96. The inductance of a coil in which a current of 0.1 A increasing at the rate of 0.5A/s represents a power flow of 1/2 W, is:

a.2 H

b.10 H

c.20 H

d.8 H

97. During swinging of simple pendulum:

a.the mechanical energy remains constant in the presence of air resistance

b.the work done by gravitational force is zero

c.the work done by tension force is always zero

d.the mechanical energy of bob does not remain constant in the absence of air

98. What happen to the elastic property of a substance after annealing (cooling slowly after heating)?

a.Becomes zero

b.Decreases

c.Increases

d.Remains as such

99. Image formed by convex mirror is:

a.enlarged

b.real

c.virtual

d.inverted

100. To use a moving coil galvanometer as an ammeter one must connect:

a.low resistance in parallel with the coil

b.high resistance in series with the coil

c.low resistance in series with the coil

d.high resistance in parallel with the coil

Also See

General Mental Ability MCQs
Numerical Ability MCQs
Current Affairs MCQs January 2022
Current Affairs MCQs February 2022
Current Affairs MCQs March 2022

Physics MCQ Question Answers – 100 MCQs for Practice

Physics MCQ Question Answers for Various Entrance Exams

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