Physics Oscillations Online Mcqs Test

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Question 1

1. To make the frequency double of an oscillator, we have to

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Half the mass

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Reduce the mass to one-fourth

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Quadruple the mass

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Double the mass

Question 2

2. Which one of the following is a simple harmonic motion?

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Wave moving through a string fixed at both ends.

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Particle moving in a circle with uniform speed.

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Earth spinning about its own axis

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Ball bouncing between two rigid vertical walls

Question 3

3. The damped oscillations are produced due to

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Frictional support of the system

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Air resistance

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All of these

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System friction

Question 4

4. The waveform of simple harmonic motion will be

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Saw tooth waveform

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Square wave

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None of these

Question 5

5. If the length of the pendulum becomes four times, its time period will become

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Nine times

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Four times

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Three times

Question 6

6. Oscillatory motion is a type of motion which is

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Vibratory motion

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All of these

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To and fro

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Periodic motions

Question 7

7. In a simple harmonic motion (SHM), which of the following does not hold?

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The potential energy is maximum at the mean position

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The force on the particle is maximum at the ends

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The kinetic energy is maximum at the mean position

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The acceleration is minimum at the mean position

Question 8

8. In a simple harmonic motion (SHM), which of the following does not hold?

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The force on the particle is maximum at the ends

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The acceleration is minimum at the mean position

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The kinetic energy is maximum at the mean position

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The potential energy is maximum at the mean position

Question 9

9. The process whereby energy is dissipated from the oscillating system in called

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Oscillation

Question 10

10. Forced vibration are known as

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Driven harmonic vibration

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Natural vibration

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Free vibration

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Simple harmonic vibration

Question 11

11. Natural frequency of simple pendulum depends upon

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Its length

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Square of its length

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Square root of its length

Question 12

12. The time period so a system executing simple harmonic motion depends upon

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Force constant

Question 13

13. The potential energy of a spring executing SHM is given by the

Question 14

14. The waves produced in microwave oven have a wavelength

Question 15

15. If mass attached to a spring increases, then its time period

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Remains constant

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Becomes zero

Question 16

16. The damping depends upon

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None of these

Question 17

17. In case of a forced vibration, the resonance becomes very sharp when the

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Restoring force is small

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Applied periodic force is small

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Quality factor is small

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Damping force is small

Question 18

18. When a body movies in a circle, its projection performs what type of motion?

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Simple Harmonic Motion

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Rectilinear Motion

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Circular Motion

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Angular Motion

Question 19

19. A simple harmonic motion in which the

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Acceleration produced is due to restoring force

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All of these

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Acceleration is directed towards the mean position

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Acceleration is directly proportional to displacement

Question 20

20. The frequency of second pendulum is

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None of these

Question 21

21. One vibration means, the motion of mass from its

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All of these

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From extreme position

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From means position to back to its means position

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Means position to upper extreme position

Question 22

22. In a progressive wave, the distance between two consecutive crests is

Question 23

23. Simple harmonic motion is defined as the motion of a particle such that

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Its displacement x is related to its velocity b by the expression v = ωt.

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Its displacement x is always given by the expression x = x₀ sin ωt.

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Its acceleration is proportional to, and in the opposite direction to, the displacement

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Its acceleration is always ω²x₀ and its directed at right angles to its motion

Question 24

24. In simple harmonic motion

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The velocity and acceleration of the vibrating particle are in the same phase.

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The acceleration of the vibrating particle is ahead of displacement by a phase of π.

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The velocity of the vibrating particle is ahead in phase of the displacement by and angle π.

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The velocity and displacement if the vibrating particle are in the same phase

Question 25

25. The type of motion in which an oscillating disturbance is transmitted from one position to the next without the actual rectilinear translation of the particles of the medium is called

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Periodic motion

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Wave motion

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Rotatory motion

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Rectilinear motion

Question 26

26. Hook’s law is defined as

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F and X are direct proportional

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None of these

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F and X has no relation

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F and X are inverse proportional

Question 27

27. Specific response of a system which is able to oscillate with a certain period, to an external force acting with the same period is called

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Time period

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Wavelength

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Doppler’s effect

Question 28

28. In case of a vibrating Pendulum, if the mass of the pendulum is doubled then its time period

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Become on fourth

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Becomes Double

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Becomes one half

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Remains same

Question 29

29. At the frequency of 2450 MHz, the waves are absorbed due to resonance by

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Fat molecules

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Water molecules

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All of these

Question 30

30. If the magnitude of displacement is numerically equal to that of acceleration, then the time period is

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2π second

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4π second

Question 31

31. When the displacement is half of the amplitude, the ratio of potential energy to the total energy is

Question 32

32. The kinetic energy is maximum when mass at equilibrium

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P.E.max 1.2 KX²

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P.E.max 1.2 KX₀²

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P.E.max 1.2 K² X

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None of these

Question 33

33. The velocity of the body changes at different points, it is maximum at

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Extreme position

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None of these

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Mean position

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Between mean and extreme position

Question 34

34. A pendulum clock set to give correct time in Karachi is taken to Quetta. It would give correct time if

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The mass of the pendulum is increased

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The length of the pendulum is increased

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The mass of the pendulum is decreased

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The length of the pendulum is decreased

Question 35

35. The product of frequency and time period is equal to

Question 36

36. A vertical mass-spring system executes simple harmonic oscillations with a period of 2s A quantity of this system which exhibits simple harmonic variation with a period of 1s is

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Difference between kinetic energy and potential energy

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Potential energy

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Phase difference between acceleration and displacement

Question 37

37. If a simple pendulum is shifted from Multan to Mount Everest, then its time period

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Becomes zero

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Remains constant

Question 38

38. Phase of SHM describes

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Direction of motion only

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Both displacement and direction of motion

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Displacement only

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Neither displacement nor direction of motion

Question 39

39. Identify the exact statement among the following:

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A simple pendulum with a bob of mass M swings with an angular amplitude of 40°. When its angular amplitude is 20°, the tension in the string is less than Mg cos 20°.

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The fractional change in the time period of a pendulum on changing the temperature is independent of the length of the pendulum.

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As the length of a simple pendulum is increased, the maximum velocity of its bob during its oscillation will also increase

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The greater the mass of pendulum bob, the shorter is its frequency of oscillation

Question 40

40. The speed of a particle executing SHM along a circular path is given by the relation

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V = ω√r² – x²

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None of these

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V = √r² – x²

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V = r² – x²

Question 41

41. Two springs of spring constants 1500 N/m and 3000 N/m respectively are stretched with the same force. They will have potential energy in the ratio

Question 42

42. The body oscillates due to a

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Restoring force

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None of these

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Applied force

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Frictional force

Question 43

43. The restoring force applied on the pendulum

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-mg cos θ

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-mg sin θ

Question 44

44. Total distance traveled by bob of simple pendulum in one vibration is equal to

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Square of amplitude

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2 x amplitude

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4 x amplitude

Question 45

45. In vibratory motion

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Total energy remain constant

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Total momentum remain constant

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P.E. remains constant

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K.E. remain constant

Question 46

46. Phenomenon of resonance is very often employed to determine the

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None of these

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Wavelength of the various bodies

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Amplitudes of the various bodies

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Wavelength of the various bodies

Question 47

47. The energy absorbed by a body is _________ at resonance.

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Minimum only

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Maximum only

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Maximum as well minimum

Question 48

48. In energy conservation, when spring is stretched slowly so that acceleration is

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None of these

Question 49

49. In a simple harmonic oscillator, at the mean position

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Both kinetic and potential energies are minimum

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Kinetic energy is minimum, potential energy is maximum

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Both kinetic and potential energies are maximum

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Kinetic energy is maximum, potential energy is minimum

Question 50

50. If the metal bob in a simple pendulum is replaced by a wooden bob, then its time period will

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First A then B

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Remain the same

Question 51

51. A particle executes SHM. The graph of its velocity as a function of displacement is

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An ellipse

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A straight line

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A hyperbola

Question 52

52. A driven harmonic oscillator is the device in which, a physical system undergoes

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Forced vibration

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Free vibrations

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Powerful vibration

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None of these

Question 53

53. The vibrating bodies produce

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Disturbance

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All of these

Question 54

54. In case of a simple pendulum the cause of damping is

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None of these

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Drag force of air

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Tension is string

Question 55

55. The energy of the oscillation comes from the

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Starting source

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Driving source

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None of these

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Applied force

Question 56

56. Two springs of spring constants k₁ and k₂ are joined in series. The effective spring constant of the combination is given by

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(k₁ + k₂)/2

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k₁ k₂/( k₁ + k₂)

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k₁ + k₂

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√k₁ k₂

Question 57

57. S.I unit of frequency is

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Vibration S¯²

Question 58

58. Turning of a radio set is an example of

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Mechanical resonance

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Musical resonance

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Electrical resonance

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Free vibration

Question 59

59. The total energy of a particle, executing simple harmonic moron is

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Independent of x

Question 60

60. In which of the following lists are all three quantities constant when a particle moves in undamped simple harmonic motion?

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Angular frequency, Acceleration, force

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Amplitude, angular frequency, acceleration

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Total energy, amplitude, angular frequency

Answer

Acceleration, force, total energy

Question 61

61. If the period of oscillation of mass (M) suspended from a spring is 2s, then the period of mass 4M will be

Question 62

62. To make the frequency double of a spring oscillator, we have to:

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Half the mass

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Quadruple the mass

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Reduce the mass to one fourth

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Double the mass

Question 63

63. For a simple pendulum the restoring force is caused by

Answer

All of these

Question 64

64. The work done is stretching spring appears as elastic potential energy of the spring is

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None of these

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P.E. = ½ KX²

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P.E. = ½ K²X²

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P.E. = ½ KX₀²

Answer 183

V α – x

Answer 184

F α – x

Answer 185

A α – x

Answer 186

K.E. Energy

Answer 187

P.E. Energy

Answer 188

Angular Momentum

Answer 189

Total Energy

Answer 190

Maximum in the extreme position

Answer 191

Zero in the mean position

Answer 192

None of these

Answer 193

Extra ordinarily large

Answer 194

Mean Position

Answer 195

Extreme Position

Answer 196

Both a and b

Answer 197

Minimum frequency

Answer 198

Natural frequency

Answer 199

Maximum frequency

Answer 200

None of these

Answer 201

The mass of the pendulum is increased

Answer 202

The length of the pendulum is decreased

Answer 203

The length of the pendulum is increased

Answer 204

The mass of the pendulum is decreased

Answer 205

Extreme position

Answer 206

Mean position

Answer 207

Both a and b

Answer 208

Time period will not change

Answer 209

Time period will increase

Answer 210

Time period will decrease

Answer 211

Time period will depend on the weight of the boy.

Answer 212

Time to take one Vibration

Answer 213

Number of vibration for second

Answer 214

Number of vibrations per minute

Answer 215

None of these

Answer 216

On stretching s spring

Answer 217

One the rising of an air bubble in water

Answer 218

On compressing a spring

Answer 219

On moving a body against gravitational force

Answer 220

Remain unaffected

Answer 221

Become infinite

Answer 222

Light inextensible string

Answer 223

All of these

Answer 224

Small heavy mass

Answer 225

Friction less support

Answer 226

Half way between them

Answer 227

Crossing mean position

Answer 228

Displacement is maximum

Answer 229

Becomes zero

Answer 230

Remains constant

Answer 231

None of these

Answer 232

X = X₀ sin ωt

Answer 233

X = X₀ cos (ωt + φ)

Answer 234

X = X₀ cos ωt

Answer 235

X₀ ω cos θ

Answer 236

Vp sin (90° - θ)

Answer 237

All of these

Total Questions:	87
Time Allowed:	40 Minutes
Total Marks:	87
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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