Physics Oscillations Online Mcqs Test

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Question 1

1. A sine wave is represented by Q. The distance between the two particles having same maximum displacement is

Question 2

2. A simple pendulum is defined as

Answer

Friction less support

Answer

All of these

Answer

Light inextensible string

Answer

Small heavy mass

Question 3

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

Answer

Three times

Answer

Four times

Answer

Nine times

Question 4

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

Answer

None of these

Answer

Natural frequency

Answer

Maximum frequency

Answer

Minimum frequency

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. Restoring force is defined as

Question 7

7. 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

Wave motion

Answer

Periodic motion

Answer

Rectilinear motion

Answer

Rotatory motion

Question 8

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

Question 9

9. The damping depends upon

Answer

None of these

Question 10

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

Answer

All of these

Question 11

11. 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 acceleration is minimum 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

Question 12

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

Answer

X₀ ω cos θ

Answer

Vp sin (90° - θ)

Answer

All of these

Question 13

13. Identify the exact statement among the following:

Answer

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

Answer

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

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 14

14. Frequency is the term used for

Answer

None of these

Answer

Number of vibration for second

Answer

Number of vibrations per minute

Answer

Time to take one Vibration

Question 15

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

Question 16

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

Answer

Minimum only

Answer

Maximum as well minimum

Answer

Maximum only

Question 17

17. Oscillatory motion is a type of motion which is

Answer

Vibratory motion

Answer

Periodic motions

Answer

To and fro

Answer

All of these

Question 18

18. In vibratory motion which parameter remains constant?

Answer

K.E. Energy

Answer

P.E. Energy

Answer

Total Energy

Answer

Angular Momentum

Question 19

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

Answer

Forced vibration

Answer

Powerful vibration

Answer

None of these

Answer

Free vibrations

Question 20

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

Answer

Damping force is small

Answer

Applied periodic force is small

Answer

Quality factor is small

Answer

Restoring force is small

Question 21

21. 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 22

22. In simple harmonic motion

Answer

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

Answer

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

Answer

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

Answer

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

Question 23

23. The relation for the displacement in SHM is

Answer

X = X₀ sin ωt

Answer

X = X₀ cos (ωt + φ)

Answer

X = X₀ cos ωt

Answer

None of these

Question 24

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

Question 25

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

Answer

(k₁ + k₂)/2

Answer

k₁ + k₂

Answer

k₁ k₂/( k₁ + k₂)

Answer

√k₁ k₂

Question 26

26. 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 increase

Answer

Time period will depend on the weight of the boy.

Answer

Time period will decrease

Answer

Time period will not change

Question 27

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

Question 28

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

Answer

Reduce the mass to one-fourth

Answer

Double the mass

Answer

Half the mass

Answer

Quadruple the mass

Question 29

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

Answer

Angular frequency, Acceleration, force

Answer

Acceleration, force, total energy

Answer

Total energy, amplitude, angular frequency

Answer

Amplitude, angular frequency, acceleration

Question 30

30. 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

Remain unaffected

Answer

Become infinite

Question 31

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

Question 32

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

Answer

Crossing mean position

Answer

Half way between them

Answer

Displacement is maximum

Question 33

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

Question 34

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

Answer

Becomes zero

Answer

Remains constant

Question 35

35. 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

Difference between kinetic energy and potential energy

Answer

Phase difference between acceleration and displacement

Answer

Potential energy

Question 36

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

Answer

Force constant

Question 37

37. The kinetic energy is maximum when mass at equilibrium

Answer

P.E.max 1.2 K² X

Answer

P.E.max 1.2 KX₀²

Answer

P.E.max 1.2 KX²

Answer

None of these

Question 38

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

Answer

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

Answer

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

Answer

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

Answer

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

Question 39

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

Answer

Wavelength of the various bodies

Answer

None of these

Answer

Amplitudes of the various bodies

Answer

Wavelength of the various bodies

Question 40

40. In vibratory motion

Answer

K.E. remain constant

Answer

Total energy remain constant

Answer

P.E. remains constant

Answer

Total momentum remain constant

Question 41

41. In which case does the potential energy decreases?

Answer

On compressing a spring

Answer

On stretching s spring

Answer

One the rising of an air bubble in water

Answer

On moving a body against gravitational force

Question 42

42. The frequency of second pendulum is

Answer

None of these

Question 43

43. Natural frequency of simple pendulum depends upon

Answer

Square root of its length

Answer

Its length

Answer

Square of its length

Question 44

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

Answer

Independent of x

Question 45

45. The restoring force applied on the pendulum

Answer

-mg sin θ

Answer

-mg cos θ

Question 46

46. Phase of SHM describes

Answer

Both displacement and direction of motion

Answer

Neither displacement nor direction of motion

Answer

Direction of motion only

Answer

Displacement only

Question 47

47. 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 48

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

Answer

Tension is string

Answer

Drag force of air

Answer

None of these

Question 49

49. The energy of the oscillation comes from the

Answer

Applied force

Answer

Starting source

Answer

None of these

Answer

Driving source

Question 50

50. Forced vibration are known as

Answer

Simple harmonic vibration

Answer

Natural vibration

Answer

Driven harmonic vibration

Answer

Free vibration

Question 51

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

Answer

Oscillation

Question 52

52. 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 decreased

Answer

The mass of the pendulum is increased

Answer

The length of the pendulum is increased

Question 53

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

Answer

Remains constant

Answer

Becomes zero

Question 54

54. 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 kinetic energy is maximum at the mean position

Answer

The potential energy is maximum at the mean position

Answer

The acceleration is minimum at the mean position

Question 55

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

Answer

2π second

Answer

4π second

Question 56

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

Answer

Rectilinear Motion

Answer

Angular Motion

Answer

Circular Motion

Answer

Simple Harmonic Motion

Question 57

57. 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

Answer

Doppler’s effect

Answer

Time period

Answer

Wavelength

Question 58

58. 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 59

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

Answer

None of these

Question 60

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

Answer

None of these

Answer

Mean position

Answer

Between mean and extreme position

Answer

Extreme position

Question 61

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

Answer

Remain the same

Answer

First A then B

Question 62

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

Answer

Fat molecules

Answer

All of these

Answer

Water molecules

Question 63

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

Answer

Mean position

Answer

Extreme position

Answer

Both a and b

Question 64

64. The damped oscillations are produced due to

Answer

System friction

Answer

All of these

Answer

Air resistance

Answer

Frictional support of the system

Answer 173

Restoring force

Answer 174

None of these

Answer 175

Frictional force

Answer 176

Applied force

Answer 177

Disturbance

Answer 178

All of these

Answer 179

None of these

Answer 180

Zero in the mean position

Answer 181

Maximum in the extreme position

Answer 182

Remains constant

Answer 183

Becomes zero

Answer 184

Kinetic energy is minimum, potential energy is maximum

Answer 185

Kinetic energy is maximum, potential energy is minimum

Answer 186

Both kinetic and potential energies are maximum

Answer 187

Both kinetic and potential energies are minimum

Answer 188

All of these

Answer 189

Acceleration produced is due to restoring force

Answer 190

Acceleration is directly proportional to displacement

Answer 191

Acceleration is directed towards the mean position

Answer 192

Double the mass

Answer 193

Half the mass

Answer 194

Quadruple the mass

Answer 195

Reduce the mass to one fourth

Answer 196

Means position to upper extreme position

Answer 197

From means position to back to its means position

Answer 198

From extreme position

Answer 199

All of these

Answer 200

None of these

Answer 201

F and X are direct proportional

Answer 202

F and X has no relation

Answer 203

F and X are inverse proportional

Answer 204

Wave moving through a string fixed at both ends.

Answer 205

Ball bouncing between two rigid vertical walls

Answer 206

Particle moving in a circle with uniform speed.

Answer 207

Earth spinning about its own axis

Answer 208

Electrical resonance

Answer 209

Musical resonance

Answer 210

Mechanical resonance

Answer 211

Free vibration

Answer 212

Extra ordinarily large

Answer 213

V α – x

Answer 214

A α – x

Answer 215

F α – x

Answer 216

A hyperbola

Answer 217

A straight line

Answer 218

An ellipse

Answer 219

The mass of the pendulum is decreased

Answer 220

The mass of the pendulum is increased

Answer 221

The length of the pendulum is decreased

Answer 222

The length of the pendulum is increased

Answer 223

Both a and b

Answer 224

Extreme Position

Answer 225

Mean Position

Answer 226

Vibration S¯²

Answer 227

None of these

Answer 228

Saw tooth waveform

Answer 229

Square wave

Answer 230

P.E. = ½ KX²

Answer 231

P.E. = ½ KX₀²

Answer 232

P.E. = ½ K²X²

Answer 233

None of these

Answer 234

Remains same

Answer 235

Becomes Double

Answer 236

Become on fourth

Answer 237

Becomes one half

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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