Physics Oscillations Online Mcqs Test

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Question 1

1. Hook’s law is defined as

Answer

F and X are direct proportional

Answer

F and X are inverse proportional

Answer

None of these

Answer

F and X has no relation

Question 2

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

Question 3

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

Question 4

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

Answer

4 x amplitude

Answer

2 x amplitude

Answer

Square of amplitude

Question 5

5. The vibrating bodies produce

Answer

All of these

Answer

Disturbance

Question 6

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

Answer

Extra ordinarily large

Question 7

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

Answer

Force constant

Question 8

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

Answer

Remains constant

Answer

Becomes zero

Question 9

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

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Four times

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Three times

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Nine times

Question 10

10. A simple pendulum is defined as

Answer

All of these

Answer

Light inextensible string

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Friction less support

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Small heavy mass

Question 11

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

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Maximum in the extreme position

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Zero in the mean position

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None of these

Question 12

12. Identify the exact statement among the following:

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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.

Answer

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

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

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

Question 13

13. 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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Doppler’s effect

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Wavelength

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Time period

Question 14

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

Answer

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 kinetic energy is maximum at the mean position

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The force on the particle is maximum at the ends

Question 15

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

Answer

Independent of x

Question 16

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

Answer

Maximum as well minimum

Answer

Minimum only

Answer

Maximum only

Question 17

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

Answer

Becomes zero

Answer

Remains constant

Question 18

18. The energy of the oscillation comes from the

Answer

Starting source

Answer

None of these

Answer

Applied force

Answer

Driving source

Question 19

19. The frequency of second pendulum is

Answer

None of these

Question 20

20. In simple harmonic motion

Answer

The velocity and displacement if 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 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.

Question 21

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

Answer

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

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The potential energy is maximum at the mean position

Question 22

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

Answer

Remains same

Answer

Becomes one half

Answer

Becomes Double

Answer

Become on fourth

Question 23

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

Answer

Mean Position

Answer

Extreme Position

Answer

Both a and b

Question 24

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

Answer

Both a and b

Answer

Mean position

Answer

Extreme position

Question 25

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

Question 26

26. Forced vibration are known as

Answer

Driven harmonic vibration

Answer

Simple harmonic vibration

Answer

Natural vibration

Answer

Free vibration

Question 27

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

Question 28

28. Oscillatory motion is a type of motion which is

Answer

To and fro

Answer

All of these

Answer

Vibratory motion

Answer

Periodic motions

Question 29

29. Restoring force is defined as

Question 30

30. Natural frequency of simple pendulum depends upon

Answer

Its length

Answer

Square root of its length

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Square of its length

Question 31

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

Question 32

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

Answer

P.E. = ½ K²X²

Answer

P.E. = ½ KX²

Answer

None of these

Answer

P.E. = ½ KX₀²

Question 33

33. Frequency is the term used for

Answer

Number of vibration for second

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Number of vibrations per minute

Answer

Time to take one Vibration

Answer

None of these

Question 34

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

Answer

Earth spinning about its own axis

Answer

Ball bouncing between two rigid vertical walls

Answer

Wave moving through a string fixed at both ends.

Answer

Particle moving in a circle with uniform speed.

Question 35

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

Answer

Amplitudes of the various bodies

Answer

None of these

Answer

Wavelength of the various bodies

Answer

Wavelength of the various bodies

Question 36

36. In vibratory motion which parameter remains constant?

Answer

Total Energy

Answer

Angular Momentum

Answer

P.E. Energy

Answer

K.E. Energy

Question 37

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

Answer

Double the mass

Answer

Reduce the mass to one fourth

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Quadruple the mass

Answer

Half the mass

Question 38

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

Answer

Mean position

Answer

Extreme position

Answer

None of these

Answer

Between mean and extreme position

Question 39

39. Simple harmonic motion is mathematically represented as

Answer

A α – x

Answer

F α – x

Answer

V α – x

Question 40

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

Answer

4π second

Answer

2π second

Question 41

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

Answer

Quality factor is small

Answer

Restoring force is small

Answer

Damping force is small

Answer

Applied periodic force is small

Question 42

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

Answer

Vp sin (90° - θ)

Answer

X₀ ω cos θ

Answer

All of these

Question 43

43. In which case does the potential energy decreases?

Answer

On stretching s spring

Answer

On moving a body against gravitational force

Answer

One the rising of an air bubble in water

Answer

On compressing a spring

Question 44

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

Answer

Means position to upper extreme position

Answer

From means position to back to its means position

Answer

All of these

Answer

From extreme position

Question 45

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

Answer

Oscillation

Question 46

46. The relation for the displacement in SHM is

Answer

None of these

Answer

X = X₀ cos (ωt + φ)

Answer

X = X₀ cos ωt

Answer

X = X₀ sin ωt

Question 47

47. 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 48

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

Answer

None of these

Answer

V = r² – x²

Answer

V = ω√r² – x²

Answer

V = √r² – x²

Question 49

49. S.I unit of frequency is

Answer

Vibration S¯²

Question 50

50. 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 mass of the pendulum is increased

Answer

The length of the pendulum is decreased

Answer

The length of the pendulum is increased

Question 51

51. 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 52

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

Question 53

53. 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 54

54. 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 55

55. 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 56

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

Answer

Circular Motion

Answer

Rectilinear Motion

Answer

Simple Harmonic Motion

Answer

Angular Motion

Question 57

57. 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.

Answer

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

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

Answer

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

Question 58

58. 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 59

59. In vibratory motion

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K.E. remain constant

Answer

P.E. remains constant

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Total energy remain constant

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Total momentum remain constant

Question 60

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

Question 61

61. Turning of a radio set is an example of

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Electrical resonance

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Free vibration

Answer

Musical resonance

Answer

Mechanical resonance

Question 62

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

Answer

Natural frequency

Answer

None of these

Answer

Maximum frequency

Answer

Minimum frequency

Question 63

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

Answer

Acceleration, force, total energy

Answer

Amplitude, angular frequency, acceleration

Answer

Angular frequency, Acceleration, force

Answer

Total energy, amplitude, angular frequency

Question 64

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

Answer

Fat molecules

Answer

All of these

Answer

Water molecules

Answer 178

All of these

Answer 179

Both displacement and direction of motion

Answer 180

Displacement only

Answer 181

Neither displacement nor direction of motion

Answer 182

Direction of motion only

Answer 183

Both kinetic and potential energies are minimum

Answer 184

Both kinetic and potential energies are maximum

Answer 185

Kinetic energy is minimum, potential energy is maximum

Answer 186

Kinetic energy is maximum, potential energy is minimum

Answer 187

Frictional force

Answer 188

Applied force

Answer 189

Restoring force

Answer 190

None of these

Answer 191

Square wave

Answer 192

None of these

Answer 193

Saw tooth waveform

Answer 194

Remains constant

Answer 195

Becomes zero

Answer 196

None of these

Answer 197

P.E.max 1.2 K² X

Answer 198

P.E.max 1.2 KX₀²

Answer 199

P.E.max 1.2 KX²

Answer 200

k₁ + k₂

Answer 201

k₁ k₂/( k₁ + k₂)

Answer 202

√k₁ k₂

Answer 203

(k₁ + k₂)/2

Answer 204

Tension is string

Answer 205

None of these

Answer 206

Drag force of air

Answer 207

-mg cos θ

Answer 208

-mg sin θ

Answer 209

None of these

Answer 210

Crossing mean position

Answer 211

Displacement is maximum

Answer 212

Half way between them

Answer 213

Air resistance

Answer 214

System friction

Answer 215

All of these

Answer 216

Frictional support of the system

Answer 217

Acceleration produced is due to restoring force

Answer 218

Acceleration is directed towards the mean position

Answer 219

Acceleration is directly proportional to displacement

Answer 220

All of these

Answer 221

None of these

Answer 222

A hyperbola

Answer 223

A straight line

Answer 224

An ellipse

Answer 225

Remain unaffected

Answer 226

Become infinite

Answer 227

Free vibrations

Answer 228

None of these

Answer 229

Powerful vibration

Answer 230

Forced vibration

Answer 231

Potential energy

Answer 232

Difference between kinetic energy and potential energy

Answer 233

Phase difference between acceleration and displacement

Answer 234

The mass of the pendulum is decreased

Answer 235

The length of the pendulum is increased

Answer 236

The mass of the pendulum is increased

Answer 237

The length of the pendulum is decreased

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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