Physics Oscillations Online Mcqs Test

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Question 1

1. 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

Wave motion

Answer

Rectilinear motion

Answer

Periodic motion

Question 2

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

Answer

Reduce the mass to one fourth

Answer

Double the mass

Answer

Half the mass

Answer

Quadruple the mass

Question 3

3. The waves produced in microwave oven have a wavelength

Question 4

4. 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 5

5. 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 6

6. Restoring force is defined as

Question 7

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

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Both kinetic and potential energies are maximum

Answer

Kinetic energy is maximum, potential energy is minimum

Answer

Kinetic energy is minimum, potential energy is maximum

Answer

Both kinetic and potential energies are minimum

Question 8

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

Answer

The acceleration is minimum at the mean position

Answer

The potential energy is maximum at the mean position

Answer

The kinetic energy is maximum at the mean position

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The force on the particle is maximum at the ends

Question 9

9. Hook’s law is defined as

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None of these

Answer

F and X are inverse proportional

Answer

F and X are direct proportional

Answer

F and X has no relation

Question 10

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

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Mean position

Answer

Both a and b

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Extreme position

Question 11

11. The energy of the oscillation comes from the

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Starting source

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Applied force

Answer

None of these

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Driving source

Question 12

12. Phase of SHM describes

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Direction of motion only

Answer

Both displacement and direction of motion

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Displacement only

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Neither displacement nor direction of motion

Question 13

13. The kinetic energy is maximum when mass at equilibrium

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P.E.max 1.2 K² X

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P.E.max 1.2 KX²

Answer

P.E.max 1.2 KX₀²

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None of these

Question 14

14. The frequency of second pendulum is

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None of these

Question 15

15. 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

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From extreme position

Question 16

16. The body oscillates due to a

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Frictional force

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None of these

Answer

Restoring force

Answer

Applied force

Question 17

17. The damping depends upon

Answer

None of these

Question 18

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

Answer

Angular Motion

Answer

Rectilinear Motion

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Simple Harmonic Motion

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Circular Motion

Question 19

19. Simple harmonic motion is mathematically represented as

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A α – x

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V α – x

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F α – x

Question 20

20. 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

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Phase difference between acceleration and displacement

Answer

Difference between kinetic energy and potential energy

Question 21

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

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Becomes zero

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Remains constant

Question 22

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

Question 23

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

Question 24

24. 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 not change

Answer

Time period will decrease

Question 25

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

Answer

X₀ ω cos θ

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Vp sin (90° - θ)

Answer

All of these

Question 26

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

Answer

The length of the pendulum is increased

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The mass of the pendulum is decreased

Answer

The mass of the pendulum is increased

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The length of the pendulum is decreased

Question 27

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

Answer

Half the mass

Answer

Reduce the mass to one-fourth

Answer

Quadruple the mass

Answer

Double the mass

Question 28

28. 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.

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

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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 29

29. The waveform of simple harmonic motion will be

Answer

Saw tooth waveform

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Square wave

Answer

None of these

Question 30

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

Answer

Quality factor is small

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Damping force is small

Answer

Applied periodic force is small

Answer

Restoring force is small

Question 31

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

Question 32

32. In simple harmonic motion

Answer

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

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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 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

Question 33

33. A simple pendulum is defined as

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Small heavy mass

Answer

Light inextensible string

Answer

Friction less support

Answer

All of these

Question 34

34. The damped oscillations are produced due to

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Frictional support of the system

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Air resistance

Answer

All of these

Answer

System friction

Question 35

35. 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 36

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

Answer

Oscillation

Question 37

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

Answer

Extra ordinarily large

Question 38

38. In vibratory motion which parameter remains constant?

Answer

K.E. Energy

Answer

Total Energy

Answer

Angular Momentum

Answer

P.E. Energy

Question 39

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

Answer

Maximum frequency

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Minimum frequency

Answer

Natural frequency

Answer

None of these

Question 40

40. Natural frequency of simple pendulum depends upon

Answer

Its length

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Square root of its length

Answer

Square of its length

Question 41

41. The restoring force applied on the pendulum

Answer

-mg sin θ

Answer

-mg cos θ

Question 42

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

Answer

Independent of x

Question 43

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

Question 44

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

Answer

2π second

Answer

4π second

Question 45

45. Identify the exact statement among the following:

Answer

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

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°.

Question 46

46. S.I unit of frequency is

Answer

Vibration S¯²

Question 47

47. In which case does the potential energy decreases?

Answer

On stretching s spring

Answer

One the rising of an air bubble in water

Answer

On moving a body against gravitational force

Answer

On compressing a spring

Question 48

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

Answer

Ball bouncing between two rigid vertical walls

Answer

Earth spinning about its own axis

Answer

Particle moving in a circle with uniform speed.

Answer

Wave moving through a string fixed at both ends.

Question 49

49. 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 50

50. Frequency is the term used for

Answer

Time to take one Vibration

Answer

Number of vibrations per minute

Answer

None of these

Answer

Number of vibration for second

Question 51

51. 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 52

52. The relation for the displacement in SHM is

Answer

X = X₀ cos (ωt + φ)

Answer

X = X₀ cos ωt

Answer

X = X₀ sin ωt

Answer

None of these

Question 53

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

Question 54

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

Answer

Force constant

Question 55

55. The vibrating bodies produce

Answer

All of these

Answer

Disturbance

Question 56

56. Turning of a radio set is an example of

Answer

Free vibration

Answer

Electrical resonance

Answer

Mechanical resonance

Answer

Musical resonance

Question 57

57. A simple harmonic motion in which the

Answer

All of these

Answer

Acceleration is directed towards the mean position

Answer

Acceleration produced is due to restoring force

Answer

Acceleration is directly proportional to displacement

Question 58

58. Oscillatory motion is a type of motion which is

Answer

All of these

Answer

Periodic motions

Answer

To and fro

Answer

Vibratory motion

Question 59

59. 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 60

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

Answer

None of these

Answer

Drag force of air

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Tension is string

Question 61

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

Answer

Powerful vibration

Answer

Forced vibration

Answer

Free vibrations

Answer

None of these

Question 62

62. 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 increased

Answer

The length of the pendulum is increased

Answer

The length of the pendulum is decreased

Answer

The mass of the pendulum is decreased

Question 63

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

Question 64

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

Answer 172

Three times

Answer 173

Nine times

Answer 174

Four times

Answer 175

Total energy remain constant

Answer 176

Total momentum remain constant

Answer 177

P.E. remains constant

Answer 178

K.E. remain constant

Answer 179

P.E. = ½ KX²

Answer 180

P.E. = ½ KX₀²

Answer 181

P.E. = ½ K²X²

Answer 182

None of these

Answer 183

None of these

Answer 184

V = r² – x²

Answer 185

V = ω√r² – x²

Answer 186

V = √r² – x²

Answer 187

An ellipse

Answer 188

A straight line

Answer 189

A hyperbola

Answer 190

Extreme position

Answer 191

None of these

Answer 192

Between mean and extreme position

Answer 193

Mean position

Answer 194

Amplitude, angular frequency, acceleration

Answer 195

Total energy, amplitude, angular frequency

Answer 196

Acceleration, force, total energy

Answer 197

Angular frequency, Acceleration, force

Answer 198

k₁ + k₂

Answer 199

k₁ k₂/( k₁ + k₂)

Answer 200

√k₁ k₂

Answer 201

(k₁ + k₂)/2

Answer 202

All of these

Answer 203

Becomes zero

Answer 204

Remains constant

Answer 205

Becomes zero

Answer 206

Remains constant

Answer 207

The acceleration is minimum at the mean position

Answer 208

The kinetic energy is maximum at the mean position

Answer 209

The potential energy is maximum at the mean position

Answer 210

The force on the particle is maximum at the ends

Answer 211

Doppler’s effect

Answer 212

Wavelength

Answer 213

Time period

Answer 214

Wavelength of the various bodies

Answer 215

Wavelength of the various bodies

Answer 216

Amplitudes of the various bodies

Answer 217

None of these

Answer 218

4 x amplitude

Answer 219

Square of amplitude

Answer 220

2 x amplitude

Answer 221

Both a and b

Answer 222

Mean Position

Answer 223

Extreme Position

Answer 224

Maximum only

Answer 225

Minimum only

Answer 226

Maximum as well minimum

Answer 227

None of these

Answer 228

Maximum in the extreme position

Answer 229

Zero in the mean position

Answer 230

None of these

Answer 231

Natural vibration

Answer 232

Driven harmonic vibration

Answer 233

Free vibration

Answer 234

Simple harmonic vibration

Answer 235

Displacement is maximum

Answer 236

Half way between them

Answer 237

Crossing mean position

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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