Physics Oscillations Online Mcqs Test

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Question 1

1. The vibrating bodies produce

Answer

All of these

Answer

Disturbance

Question 2

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

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

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

Question 3

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

Question 4

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

Answer

None of these

Question 5

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

Answer

Natural frequency

Answer

Minimum frequency

Answer

Maximum frequency

Answer

None of these

Question 6

6. Oscillatory motion is a type of motion which is

Answer

Periodic motions

Answer

To and fro

Answer

All of these

Answer

Vibratory motion

Question 7

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

Answer

All of these

Answer

Vp sin (90° - θ)

Answer

X₀ ω cos θ

Question 8

8. The body oscillates due to a

Answer

Frictional force

Answer

Restoring force

Answer

Applied force

Answer

None of these

Question 9

9. The damping depends upon

Answer

None of these

Question 10

10. The relation for the displacement in SHM is

Answer

X = X₀ cos ωt

Answer

None of these

Answer

X = X₀ sin ωt

Answer

X = X₀ cos (ωt + φ)

Question 11

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

Answer

Four times

Answer

Three times

Answer

Nine times

Question 12

12. 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 13

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

Answer

The kinetic energy is maximum at the mean position

Answer

The acceleration is minimum at the mean position

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The force on the particle is maximum at the ends

Answer

The potential energy is maximum at the mean position

Question 14

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

Answer

Oscillation

Question 15

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

Answer

Becomes zero

Answer

Remains constant

Question 16

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

Answer

Becomes one half

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Remains same

Answer

Becomes Double

Answer

Become on fourth

Question 17

17. Frequency is the term used for

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Number of vibration for second

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Number of vibrations per minute

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Time to take one Vibration

Answer

None of these

Question 18

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

Answer

Amplitudes of the various bodies

Answer

Wavelength of the various bodies

Answer

Wavelength of the various bodies

Answer

None of these

Question 19

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

Answer

Particle moving in a circle with uniform speed.

Answer

Wave moving through a string fixed at both ends.

Answer

Earth spinning about its own axis

Answer

Ball bouncing between two rigid vertical walls

Question 20

20. The restoring force applied on the pendulum

Answer

-mg sin θ

Answer

-mg cos θ

Question 21

21. Restoring force is defined as

Question 22

22. 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 depend on the weight of the boy.

Answer

Time period will increase

Answer

Time period will not change

Answer

Time period will decrease

Question 23

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

Answer

All of these

Question 24

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

Answer

4π second

Answer

2π second

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

Answer

Rotatory motion

Answer

Periodic motion

Answer

Rectilinear motion

Answer

Wave motion

Question 26

26. 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/( k₁ + k₂)

Answer

√k₁ k₂

Answer

k₁ + k₂

Question 27

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

Question 28

28. 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 mass of the pendulum is increased

Answer

The length of the pendulum is decreased

Question 29

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

Answer

Extra ordinarily large

Question 30

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

Answer

Maximum as well minimum

Answer

Minimum only

Answer

Maximum only

Question 31

31. S.I unit of frequency is

Answer

Vibration S¯²

Question 32

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

Answer

Force constant

Question 33

33. 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

Amplitude, angular frequency, acceleration

Answer

Total energy, amplitude, angular frequency

Question 34

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

Answer

Between mean and extreme position

Answer

None of these

Answer

Extreme position

Answer

Mean position

Question 35

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

Question 36

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

Answer

Both a and b

Answer

Extreme position

Answer

Mean position

Question 37

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

Answer

From extreme position

Answer

All of these

Answer

From means position to back to its means position

Answer

Means position to upper extreme position

Question 38

38. The kinetic energy is maximum when mass at equilibrium

Answer

P.E.max 1.2 KX₀²

Answer

None of these

Answer

P.E.max 1.2 K² X

Answer

P.E.max 1.2 KX²

Question 39

39. 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 velocity and displacement if the vibrating particle are in the same phase

Answer

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

Question 40

40. The frequency of second pendulum is

Answer

None of these

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 acceleration is minimum at the mean position

Answer

The kinetic energy is maximum at the mean position

Answer

The force on the particle is maximum at the ends

Question 42

42. 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 43

43. 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

Wavelength

Answer

Time period

Answer

Doppler’s effect

Question 44

44. 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 45

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

Answer

Mean Position

Answer

Both a and b

Answer

Extreme Position

Question 46

46. In vibratory motion which parameter remains constant?

Answer

Total Energy

Answer

K.E. Energy

Answer

P.E. Energy

Answer

Angular Momentum

Question 47

47. Natural frequency of simple pendulum depends upon

Answer

Square root of its length

Answer

Its length

Answer

Square of its length

Question 48

48. The energy of the oscillation comes from the

Answer

Applied force

Answer

Driving source

Answer

None of these

Answer

Starting source

Question 49

49. 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 50

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

Answer

Remains constant

Answer

Becomes zero

Question 51

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

Answer

Forced vibration

Answer

None of these

Answer

Powerful vibration

Answer

Free vibrations

Question 52

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

Answer

Remains constant

Answer

Becomes zero

Question 53

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

Answer

P.E. = ½ KX₀²

Answer

P.E. = ½ KX²

Answer

None of these

Answer

P.E. = ½ K²X²

Question 54

54. In vibratory motion

Answer

Total momentum remain constant

Answer

P.E. remains constant

Answer

K.E. remain constant

Answer

Total energy remain constant

Question 55

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

Question 56

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

Answer

Maximum in the extreme position

Answer

None of these

Answer

Zero in the mean position

Question 57

57. 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 58

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

Question 59

59. A simple pendulum is defined as

Answer

Small heavy mass

Answer

Friction less support

Answer

Light inextensible string

Answer

All of these

Question 60

60. Simple harmonic motion is mathematically represented as

Answer

F α – x

Answer

A α – x

Answer

V α – x

Question 61

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

Answer

Drag force of air

Answer

Tension is string

Answer

None of these

Question 62

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

Question 63

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

Question 64

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

Answer

Damping force is small

Answer

Quality factor is small

Answer

Restoring force is small

Answer

Applied periodic force is small

Answer 167

Crossing mean position

Answer 168

Displacement is maximum

Answer 169

Half way between them

Answer 170

Acceleration produced is due to restoring force

Answer 171

All of these

Answer 172

Acceleration is directed towards the mean position

Answer 173

Acceleration is directly proportional to displacement

Answer 174

F and X are inverse proportional

Answer 175

None of these

Answer 176

F and X has no relation

Answer 177

F and X are direct proportional

Answer 178

Square of amplitude

Answer 179

4 x amplitude

Answer 180

2 x amplitude

Answer 181

A straight line

Answer 182

A hyperbola

Answer 183

An ellipse

Answer 184

V = √r² – x²

Answer 185

None of these

Answer 186

V = r² – x²

Answer 187

V = ω√r² – x²

Answer 188

Quadruple the mass

Answer 189

Half the mass

Answer 190

Reduce the mass to one fourth

Answer 191

Double the mass

Answer 192

Simple Harmonic Motion

Answer 193

Circular Motion

Answer 194

Rectilinear Motion

Answer 195

Angular Motion

Answer 196

Potential energy

Answer 197

Difference between kinetic energy and potential energy

Answer 198

Phase difference between acceleration and displacement

Answer 199

Reduce the mass to one-fourth

Answer 200

Quadruple the mass

Answer 201

Half the mass

Answer 202

Double the mass

Answer 203

Independent of x

Answer 204

Water molecules

Answer 205

All of these

Answer 206

Fat molecules

Answer 207

Direction of motion only

Answer 208

Both displacement and direction of motion

Answer 209

Displacement only

Answer 210

Neither displacement nor direction of motion

Answer 211

Simple harmonic vibration

Answer 212

Free vibration

Answer 213

Driven harmonic vibration

Answer 214

Natural vibration

Answer 215

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

Answer 216

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 217

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

Answer 218

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

Answer 219

None of these

Answer 220

Square wave

Answer 221

Saw tooth waveform

Answer 222

Kinetic energy is maximum, potential energy is minimum

Answer 223

Kinetic energy is minimum, potential energy is maximum

Answer 224

Both kinetic and potential energies are minimum

Answer 225

Both kinetic and potential energies are maximum

Answer 226

Free vibration

Answer 227

Electrical resonance

Answer 228

Musical resonance

Answer 229

Mechanical resonance

Answer 230

The length of the pendulum is increased

Answer 231

The mass of the pendulum is increased

Answer 232

The length of the pendulum is decreased

Answer 233

The mass of the pendulum is decreased

Answer 234

Air resistance

Answer 235

System friction

Answer 236

Frictional support of the system

Answer 237

All of these

Total Questions:	87
Time Allowed:	40 Minutes
Total Marks:	87
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