Physics Oscillations Online Mcqs Test

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Question 1

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

Answer

All of these

Question 2

2. 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 3

3. The damping depends upon

Answer

None of these

Question 4

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

Answer

Mean position

Answer

Extreme position

Answer

Between mean and extreme position

Answer

None of these

Question 5

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

Answer

Both kinetic and potential energies are minimum

Answer

Kinetic energy is minimum, potential energy is maximum

Answer

Kinetic energy is maximum, potential energy is minimum

Answer

Both kinetic and potential energies are maximum

Question 6

6. The damped oscillations are produced due to

Answer

Frictional support of the system

Answer

System friction

Answer

Air resistance

Answer

All of these

Question 7

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

Answer

Oscillation

Question 8

8. Phase of SHM describes

Answer

Displacement only

Answer

Neither displacement nor direction of motion

Answer

Both displacement and direction of motion

Answer

Direction of motion only

Question 9

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

Question 10

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

Answer

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

Answer

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

Answer

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

Answer

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

Question 11

11. The vibrating bodies produce

Answer

All of these

Answer

Disturbance

Question 12

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

Question 13

13. Natural frequency of simple pendulum depends upon

Answer

Square of its length

Answer

Its length

Answer

Square root of its length

Question 14

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

Answer

Quality factor is small

Answer

Applied periodic force is small

Answer

Restoring force is small

Answer

Damping force is small

Question 15

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

Answer

Reduce the mass to one fourth

Answer

Double the mass

Answer

Quadruple the mass

Answer

Half the mass

Question 16

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

Answer

All of these

Answer

Water molecules

Answer

Fat molecules

Question 17

17. The tension in the string of a simple pendulum is

Answer

Zero in the mean position

Answer

Maximum in the extreme position

Answer

None of these

Question 18

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

Question 19

19. The frequency of second pendulum is

Answer

None of these

Question 20

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

Answer

Free vibrations

Answer

Forced vibration

Answer

None of these

Answer

Powerful vibration

Question 21

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

Answer

Becomes zero

Answer

Remains constant

Question 22

22. 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 23

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

Answer

Displacement is maximum

Answer

Crossing mean position

Answer

Half way between them

Question 24

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

Answer

V = ω√r² – x²

Answer

V = r² – x²

Answer

V = √r² – x²

Answer

None of these

Question 25

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

Answer

Remains constant

Answer

Becomes zero

Question 26

26. 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

Answer

Periodic motion

Answer

Rotatory motion

Answer

Wave motion

Answer

Rectilinear motion

Question 27

27. Turning of a radio set is an example of

Answer

Musical resonance

Answer

Mechanical resonance

Answer

Free vibration

Answer

Electrical resonance

Question 28

28. 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

Answer

Potential energy

Answer

Difference between kinetic energy and potential energy

Answer

Phase difference between acceleration and displacement

Question 29

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

Answer

All of these

Answer

X₀ ω cos θ

Answer

Vp sin (90° - θ)

Question 30

30. The restoring force applied on the pendulum

Answer

-mg sin θ

Answer

-mg cos θ

Question 31

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

Answer

The force on the particle is maximum at the ends

Answer

The potential energy is maximum at the mean position

Answer

The acceleration is minimum at the mean position

Answer

The kinetic energy is maximum at the mean position

Question 32

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

Answer

Become on fourth

Answer

Remains same

Answer

Becomes Double

Answer

Becomes one half

Question 33

33. The waveform of simple harmonic motion will be

Answer

Square wave

Answer

Saw tooth waveform

Answer

None of these

Question 34

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

Answer

4 x amplitude

Answer

Square of amplitude

Answer

2 x amplitude

Question 35

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

Answer

First A then B

Answer

Remain the same

Question 36

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

Answer

Nine times

Answer

Three times

Answer

Four times

Question 37

37. The velocity of the mass attached to a spring is maximum at

Answer

Extreme position

Answer

Both a and b

Answer

Mean position

Question 38

38. In vibratory motion which parameter remains constant?

Answer

Angular Momentum

Answer

Total Energy

Answer

P.E. Energy

Answer

K.E. Energy

Question 39

39. 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

Answer

Become infinite

Answer

Remain unaffected

Question 40

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

Answer

Independent of x

Question 41

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

Answer

The potential energy is maximum at the mean position

Answer

The force on the particle is maximum at the ends

Answer

The kinetic energy is maximum at the mean position

Answer

The acceleration is minimum at the mean position

Question 42

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

Answer

Means position to upper extreme position

Answer

All of these

Answer

From means position to back to its means position

Answer

From extreme position

Question 43

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

Answer

The mass of the pendulum is decreased

Answer

The length of the pendulum is increased

Answer

The length of the pendulum is decreased

Answer

The mass of the pendulum is increased

Question 44

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

Answer

Becomes zero

Answer

Remains constant

Question 45

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

Answer

None of these

Question 46

46. Simple harmonic motion is mathematically represented as

Answer

F α – x

Answer

A α – x

Answer

V α – x

Question 47

47. The kinetic energy is maximum when mass at equilibrium

Answer

P.E.max 1.2 KX²

Answer

P.E.max 1.2 KX₀²

Answer

P.E.max 1.2 K² X

Answer

None of these

Question 48

48. The waves produced in microwave oven have a wavelength

Question 49

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

Answer

Maximum as well minimum

Answer

Maximum only

Answer

Minimum only

Question 50

50. In simple harmonic motion

Answer

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

Answer

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

Answer

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

Answer

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

Question 51

51. Forced vibration are known as

Answer

Natural vibration

Answer

Simple harmonic vibration

Answer

Free vibration

Answer

Driven harmonic vibration

Question 52

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

Answer

An ellipse

Answer

A straight line

Answer

A hyperbola

Question 53

53. The frequency of these free oscillations is known as it s

Answer

Natural frequency

Answer

Maximum frequency

Answer

Minimum frequency

Answer

None of these

Question 54

54. Frequency is the term used for

Answer

None of these

Answer

Time to take one Vibration

Answer

Number of vibrations per minute

Answer

Number of vibration for second

Question 55

55. The time period of a simple pendulum is 2 seconds. If its length is increased by 4 times, then its period becomes

Question 56

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

Answer

P.E. = ½ KX₀²

Answer

P.E. = ½ K²X²

Answer

P.E. = ½ KX²

Answer

None of these

Question 57

57. Restoring force is defined as

Question 58

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

Answer

Amplitude, angular frequency, acceleration

Answer

Acceleration, force, total energy

Answer

Total energy, amplitude, angular frequency

Answer

Angular frequency, Acceleration, force

Question 59

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

Answer

Force constant

Question 60

60. Identify the exact statement among the following:

Answer

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

Answer

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

Answer

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°.

Answer

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

Question 61

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

Answer

Half the mass

Answer

Double the mass

Answer

Reduce the mass to one-fourth

Answer

Quadruple the mass

Question 62

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

Question 63

63. 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?

Answer

Time period will decrease

Answer

Time period will not change

Answer

Time period will depend on the weight of the boy.

Answer

Time period will increase

Question 64

64. S.I unit of frequency is

Answer

Vibration S¯²

Answer 170

On stretching s spring

Answer 171

On compressing a spring

Answer 172

One the rising of an air bubble in water

Answer 173

On moving a body against gravitational force

Answer 174

X = X₀ sin ωt

Answer 175

None of these

Answer 176

X = X₀ cos ωt

Answer 177

X = X₀ cos (ωt + φ)

Answer 178

Earth spinning about its own axis

Answer 179

Particle moving in a circle with uniform speed.

Answer 180

Ball bouncing between two rigid vertical walls

Answer 181

Wave moving through a string fixed at both ends.

Answer 182

Doppler’s effect

Answer 183

Time period

Answer 184

Wavelength

Answer 185

The mass of the pendulum is increased

Answer 186

The mass of the pendulum is decreased

Answer 187

The length of the pendulum is increased

Answer 188

The length of the pendulum is decreased

Answer 189

Both a and b

Answer 190

Extreme Position

Answer 191

Mean Position

Answer 192

Drag force of air

Answer 193

None of these

Answer 194

Tension is string

Answer 195

Periodic motions

Answer 196

Vibratory motion

Answer 197

To and fro

Answer 198

All of these

Answer 199

None of these

Answer 200

Wavelength of the various bodies

Answer 201

Amplitudes of the various bodies

Answer 202

Wavelength of the various bodies

Answer 203

Extra ordinarily large

Answer 204

Starting source

Answer 205

None of these

Answer 206

Applied force

Answer 207

Driving source

Answer 208

k₁ + k₂

Answer 209

k₁ k₂/( k₁ + k₂)

Answer 210

(k₁ + k₂)/2

Answer 211

√k₁ k₂

Answer 212

Circular Motion

Answer 213

Angular Motion

Answer 214

Simple Harmonic Motion

Answer 215

Rectilinear Motion

Answer 216

4π second

Answer 217

2π second

Answer 218

Light inextensible string

Answer 219

All of these

Answer 220

Friction less support

Answer 221

Small heavy mass

Answer 222

Acceleration is directly proportional to displacement

Answer 223

Acceleration is directed towards the mean position

Answer 224

Acceleration produced is due to restoring force

Answer 225

All of these

Answer 226

Total energy remain constant

Answer 227

K.E. remain constant

Answer 228

P.E. remains constant

Answer 229

Total momentum remain constant

Answer 230

F and X are inverse proportional

Answer 231

F and X has no relation

Answer 232

F and X are direct proportional

Answer 233

None of these

Answer 234

Frictional force

Answer 235

Restoring force

Answer 236

None of these

Answer 237

Applied 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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