Physics Oscillations Online Mcqs Test

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Question 1

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

Question 2

2. S.I unit of frequency is

Answer

Vibration S¯²

Question 3

3. 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 4

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

Answer

Quadruple the mass

Answer

Reduce the mass to one-fourth

Answer

Double the mass

Answer

Half the mass

Question 5

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

Answer

Oscillation

Question 6

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

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

Answer

The potential energy is maximum at the mean position

Question 7

7. The relation for the displacement in SHM is

Answer

X = X₀ cos (ωt + φ)

Answer

None of these

Answer

X = X₀ cos ωt

Answer

X = X₀ sin ωt

Question 8

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

Answer

Half way between them

Answer

Crossing mean position

Answer

Displacement is maximum

Question 9

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

Answer

Three times

Answer

Nine times

Answer

Four times

Question 10

10. Turning of a radio set is an example of

Answer

Mechanical resonance

Answer

Electrical resonance

Answer

Free vibration

Answer

Musical resonance

Question 11

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

Answer

Both a and b

Answer

Extreme Position

Answer

Mean Position

Question 12

12. 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 13

13. 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

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 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

Question 14

14. 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 15

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

Answer

From means position to back to its means position

Answer

All of these

Answer

From extreme position

Answer

Means position to upper extreme position

Question 16

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

Answer

Fat molecules

Answer

Water molecules

Answer

All of these

Question 17

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

Answer

Becomes zero

Answer

Remains constant

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

None of these

Answer

Wavelength of the various bodies

Question 19

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

Question 20

20. In vibratory motion which parameter remains constant?

Answer

Angular Momentum

Answer

K.E. Energy

Answer

P.E. Energy

Answer

Total Energy

Question 21

21. The damped oscillations are produced due to

Answer

Frictional support of the system

Answer

Air resistance

Answer

All of these

Answer

System friction

Question 22

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

Answer

Angular Motion

Answer

Simple Harmonic Motion

Answer

Circular Motion

Answer

Rectilinear Motion

Question 23

23. The frequency of second pendulum is

Answer

None of these

Question 24

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

Question 25

25. A simple pendulum is defined as

Answer

Small heavy mass

Answer

All of these

Answer

Light inextensible string

Answer

Friction less support

Question 26

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

Answer

Forced vibration

Answer

Powerful vibration

Answer

Free vibrations

Answer

None of these

Question 27

27. 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 28

28. 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 29

29. 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 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 30

30. The damping depends upon

Answer

None of these

Question 31

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

Answer

Becomes zero

Answer

Remains constant

Question 32

32. 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 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

Total energy, amplitude, angular frequency

Answer

Amplitude, angular frequency, acceleration

Question 34

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

Question 35

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

Answer

A hyperbola

Answer

An ellipse

Answer

A straight line

Question 36

36. 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

Rectilinear motion

Answer

Periodic motion

Answer

Wave motion

Answer

Rotatory motion

Question 37

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

Answer

V = r² – x²

Answer

V = √r² – x²

Answer

None of these

Answer

V = ω√r² – x²

Question 38

38. 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 decrease

Answer

Time period will increase

Answer

Time period will not change

Question 39

39. The energy of the oscillation comes from the

Answer

None of these

Answer

Starting source

Answer

Applied force

Answer

Driving source

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 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 displacement if the vibrating particle are in the same phase

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.

Question 42

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

Question 43

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

Answer

Extra ordinarily large

Question 44

44. Hook’s law is defined as

Answer

F and X has no relation

Answer

F and X are direct proportional

Answer

F and X are inverse proportional

Answer

None of these

Question 45

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

Answer

None of these

Answer

Zero in the mean position

Answer

Maximum in the extreme position

Question 46

46. In which case does the potential energy decreases?

Answer

One the rising of an air bubble in water

Answer

On moving a body against gravitational force

Answer

On compressing a spring

Answer

On stretching s spring

Question 47

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

Answer

Becomes one half

Answer

Becomes Double

Answer

Become on fourth

Answer

Remains same

Question 48

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

Answer

2 x amplitude

Answer

4 x amplitude

Answer

Square of amplitude

Question 49

49. 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 50

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

Question 51

51. 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

Answer

k₁ + k₂

Answer

k₁ k₂/( k₁ + k₂)

Answer

(k₁ + k₂)/2

Question 52

52. The kinetic energy is maximum when mass at equilibrium

Answer

P.E.max 1.2 KX₀²

Answer

P.E.max 1.2 KX²

Answer

P.E.max 1.2 K² X

Answer

None of these

Question 53

53. Oscillatory motion is a type of motion which is

Answer

All of these

Answer

Periodic motions

Answer

To and fro

Answer

Vibratory motion

Question 54

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

Question 55

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

Answer

Both kinetic and potential energies are maximum

Answer

Both kinetic and potential energies are minimum

Answer

Kinetic energy is maximum, potential energy is minimum

Answer

Kinetic energy is minimum, potential energy is maximum

Question 56

56. The waves produced in microwave oven have a wavelength

Question 57

57. Phase of SHM describes

Answer

Both displacement and direction of motion

Answer

Displacement only

Answer

Neither displacement nor direction of motion

Answer

Direction of motion only

Question 58

58. 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

Answer

The force on the particle is maximum at the ends

Answer

The potential energy is maximum at the mean position

Question 59

59. 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

Doppler’s effect

Answer

Time period

Question 60

60. Restoring force is defined as

Question 61

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

Answer

Remains constant

Answer

Becomes zero

Question 62

62. Natural frequency of simple pendulum depends upon

Answer

Square root of its length

Answer

Its length

Answer

Square of its length

Question 63

63. 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 decreased

Answer

The mass of the pendulum is increased

Answer

The mass of the pendulum is decreased

Answer

The length of the pendulum is increased

Question 64

64. In vibratory motion

Answer

Total energy remain constant

Answer

P.E. remains constant

Answer

K.E. remain constant

Answer

Total momentum remain constant

Answer 175

All of these

Answer 176

Both a and b

Answer 177

Mean position

Answer 178

Extreme position

Answer 179

Minimum only

Answer 180

Maximum only

Answer 181

Maximum as well minimum

Answer 182

Earth spinning about its own axis

Answer 183

Wave moving through a string fixed at both ends.

Answer 184

Ball bouncing between two rigid vertical walls

Answer 185

Particle moving in a circle with uniform speed.

Answer 186

None of these

Answer 187

Square wave

Answer 188

Saw tooth waveform

Answer 189

Applied force

Answer 190

Restoring force

Answer 191

Frictional force

Answer 192

None of these

Answer 193

Force constant

Answer 194

Disturbance

Answer 195

All of these

Answer 196

Acceleration is directed towards the mean position

Answer 197

Acceleration produced is due to restoring force

Answer 198

Acceleration is directly proportional to displacement

Answer 199

All of these

Answer 200

None of these

Answer 201

The length of the pendulum is increased

Answer 202

The mass of the pendulum is increased

Answer 203

The mass of the pendulum is decreased

Answer 204

The length of the pendulum is decreased

Answer 205

Independent of x

Answer 206

X₀ ω cos θ

Answer 207

Vp sin (90° - θ)

Answer 208

All of these

Answer 209

F α – x

Answer 210

A α – x

Answer 211

V α – x

Answer 212

-mg cos θ

Answer 213

-mg sin θ

Answer 214

Mean position

Answer 215

None of these

Answer 216

Between mean and extreme position

Answer 217

Extreme position

Answer 218

P.E. = ½ K²X²

Answer 219

P.E. = ½ KX₀²

Answer 220

P.E. = ½ KX²

Answer 221

None of these

Answer 222

None of these

Answer 223

Number of vibration for second

Answer 224

Number of vibrations per minute

Answer 225

Time to take one Vibration

Answer 226

Driven harmonic vibration

Answer 227

Free vibration

Answer 228

Natural vibration

Answer 229

Simple harmonic vibration

Answer 230

Natural frequency

Answer 231

None of these

Answer 232

Maximum frequency

Answer 233

Minimum frequency

Answer 234

Half the mass

Answer 235

Reduce the mass to one fourth

Answer 236

Double the mass

Answer 237

Quadruple the mass

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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