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

Answer

Reduce the mass to one-fourth

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Quadruple the mass

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Double the mass

Question 2

2. Simple harmonic motion is mathematically represented as

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A α – x

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F α – x

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V α – x

Question 3

3. The restoring force applied on the pendulum

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-mg sin θ

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-mg cos θ

Question 4

4. The effective component of Vp or the velocity of the particle is given by

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Vp sin (90° - θ)

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X₀ ω cos θ

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All of these

Question 5

5. 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 6

6. In a resonance striation, the driving force may be

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Extra ordinarily large

Question 7

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

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Oscillation

Question 8

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

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Amplitude, angular frequency, acceleration

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Total energy, amplitude, angular frequency

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Angular frequency, Acceleration, force

Answer

Acceleration, force, total energy

Question 9

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

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

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Its displacement x is related to its velocity b by the expression v = 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 10

10. 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 11

11. 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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Phase difference between acceleration and displacement

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Difference between kinetic energy and potential energy

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Potential energy

Question 12

12. Natural frequency of simple pendulum depends upon

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Square of its length

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Its length

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Square root of its length

Question 13

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

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Maximum only

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Minimum only

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Maximum as well minimum

Question 14

14. The waves produced in microwave oven have a wavelength

Question 15

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

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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

Question 16

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

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V = r² – x²

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V = ω√r² – x²

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None of these

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V = √r² – x²

Question 17

17. The vibrating bodies produce

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All of these

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Disturbance

Question 18

18. In simple harmonic motion

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

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

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

Question 19

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

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Force constant

Question 20

20. Hook’s law is defined as

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F and X are direct proportional

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F and X are inverse proportional

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None of these

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F and X has no relation

Question 21

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

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Both kinetic and potential energies are maximum

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Kinetic energy is maximum, potential energy is minimum

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Both kinetic and potential energies are minimum

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Kinetic energy is minimum, potential energy is maximum

Question 22

22. A simple harmonic motion in which the

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Acceleration is directed towards the mean position

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Acceleration is directly proportional to displacement

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Acceleration produced is due to restoring force

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All of these

Question 23

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

Answer

All of these

Answer

Water molecules

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Fat molecules

Question 24

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

Question 25

25. 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 potential energy is maximum at the mean position

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The kinetic energy is maximum at the mean position

Question 26

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

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None of these

Question 27

27. Forced vibration are known as

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Driven harmonic vibration

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Simple harmonic vibration

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Natural vibration

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Free vibration

Question 28

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

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Remain the same

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First A then B

Question 29

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

Question 30

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

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All of these

Question 31

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

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From means position to back to its means position

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Means position to upper extreme position

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All of these

Answer

From extreme position

Question 32

32. 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 33

33. The distance covered by a body in one complete vibration is 20cm. What is the amplitude of body?

Question 34

34. A pendulum suspended from the ceiling of a train has a period T when the train is at rest. When the train is accelerating with a uniform acceleration, the period of oscillation will

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Become infinite

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Remain unaffected

Question 35

35. S.I unit of frequency is

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Vibration S¯²

Question 36

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

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Becomes Double

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Becomes one half

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Remains same

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Become on fourth

Question 37

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

Question 38

38. The kinetic energy is maximum when mass at equilibrium

Answer

None of these

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P.E.max 1.2 KX₀²

Answer

P.E.max 1.2 K² X

Answer

P.E.max 1.2 KX²

Question 39

39. The relation for the displacement in SHM is

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None of these

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X = X₀ cos ωt

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X = X₀ cos (ωt + φ)

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X = X₀ sin ωt

Question 40

40. 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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Damping force is small

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Quality factor is small

Question 41

41. In case of a vibrating Pendulum, the potential energy is maximum at

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Mean Position

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Extreme Position

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Both a and b

Question 42

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

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Remains constant

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Becomes zero

Question 43

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

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Powerful vibration

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None of these

Answer

Forced vibration

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Free vibrations

Question 44

44. 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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Rectilinear motion

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Wave motion

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Rotatory motion

Question 45

45. 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 decreased

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The length of the pendulum is increased

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The mass of the pendulum is increased

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The length of the pendulum is decreased

Question 46

46. The frequency of second pendulum is

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None of these

Question 47

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

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Amplitudes of the various bodies

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Wavelength of the various bodies

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None of these

Answer

Wavelength of the various bodies

Question 48

48. In vibratory motion which parameter remains constant?

Answer

Angular Momentum

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Total Energy

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K.E. Energy

Answer

P.E. Energy

Question 49

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

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Independent of x

Question 50

50. In a garden, a boy is swinging in the standing position. How will the time period of the swing be affected if the boy sits down on the swing?

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Time period will not change

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Time period will decrease

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Time period will depend on the weight of the boy.

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Time period will increase

Question 51

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

Answer

Half the mass

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Reduce the mass to one fourth

Answer

Quadruple the mass

Answer

Double the mass

Question 52

52. The damping depends upon

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None of these

Question 53

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

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Ball bouncing between two rigid vertical walls

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Earth spinning about its own axis

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Particle moving in a circle with uniform speed.

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Wave moving through a string fixed at both ends.

Question 54

54. 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 decreased

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The mass of the pendulum is increased

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The length of the pendulum is decreased

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The length of the pendulum is increased

Question 55

55. 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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Wavelength

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Time period

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Doppler’s effect

Question 56

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

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Circular Motion

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Angular Motion

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Simple Harmonic Motion

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Rectilinear Motion

Question 57

57. 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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Free vibration

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Electrical resonance

Question 58

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

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A straight line

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An ellipse

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A hyperbola

Question 59

59. Oscillatory motion is a type of motion which is

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Periodic motions

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To and fro

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All of these

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Vibratory motion

Question 60

60. The energy of the oscillation comes from the

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None of these

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Starting source

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Applied force

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Driving source

Question 61

61. The restoring force of S.H.M. is maximum when particle:

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Crossing mean position

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Half way between them

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Displacement is maximum

Question 62

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

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Drag force of air

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None of these

Answer

Tension is string

Question 63

63. In a seconds pendulum, mass of the bob is 30 gm. If it is replaced by 90 gm mass. Then its time period will be

Question 64

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

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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

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The acceleration is minimum at the mean position

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The force on the particle is maximum at the ends

Answer 179

(k₁ + k₂)/2

Answer 180

√k₁ k₂

Answer 181

k₁ k₂/( k₁ + k₂)

Answer 182

k₁ + k₂

Answer 183

Square wave

Answer 184

Saw tooth waveform

Answer 185

None of these

Answer 186

P.E. = ½ KX²

Answer 187

None of these

Answer 188

P.E. = ½ K²X²

Answer 189

P.E. = ½ KX₀²

Answer 190

Becomes zero

Answer 191

Remains constant

Answer 192

Nine times

Answer 193

Four times

Answer 194

Three times

Answer 195

Mean position

Answer 196

Between mean and extreme position

Answer 197

None of these

Answer 198

Extreme position

Answer 199

Light inextensible string

Answer 200

Small heavy mass

Answer 201

Friction less support

Answer 202

All of these

Answer 203

None of these

Answer 204

Number of vibration for second

Answer 205

Number of vibrations per minute

Answer 206

Time to take one Vibration

Answer 207

Natural frequency

Answer 208

None of these

Answer 209

Minimum frequency

Answer 210

Maximum frequency

Answer 211

Mean position

Answer 212

Extreme position

Answer 213

Both a and b

Answer 214

Square of amplitude

Answer 215

2 x amplitude

Answer 216

4 x amplitude

Answer 217

On stretching s spring

Answer 218

One the rising of an air bubble in water

Answer 219

On compressing a spring

Answer 220

On moving a body against gravitational force

Answer 221

Frictional support of the system

Answer 222

Air resistance

Answer 223

System friction

Answer 224

All of these

Answer 225

4π second

Answer 226

2π second

Answer 227

None of these

Answer 228

Zero in the mean position

Answer 229

Maximum in the extreme position

Answer 230

Direction of motion only

Answer 231

Neither displacement nor direction of motion

Answer 232

Both displacement and direction of motion

Answer 233

Displacement only

Answer 234

Applied force

Answer 235

Frictional force

Answer 236

None of these

Answer 237

Restoring force

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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