Physics Oscillations Online Mcqs Test

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Question 1

1. Simple harmonic motion is mathematically represented as

Answer

V α – x

Answer

F α – x

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A α – x

Question 2

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

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Becomes zero

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Remains constant

Question 3

3. 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 4

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

Answer

Fat molecules

Answer

All of these

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Water molecules

Question 5

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

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k₁ + k₂

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k₁ k₂/( k₁ + k₂)

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√k₁ k₂

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(k₁ + k₂)/2

Question 6

6. The relation for the displacement in SHM is

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X = X₀ cos ωt

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X = X₀ cos (ωt + φ)

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None of these

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X = X₀ sin ωt

Question 7

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

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Quadruple the mass

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Reduce the mass to one fourth

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Half the mass

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Double the mass

Question 8

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

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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

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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 9

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

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An ellipse

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A hyperbola

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A straight line

Question 10

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

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Extra ordinarily large

Question 11

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

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All of these

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From extreme position

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From means position to back to its means position

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Means position to upper extreme position

Question 12

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

Question 13

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

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Zero in the mean position

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Maximum in the extreme position

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None of these

Question 14

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

Question 15

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

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Extreme position

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Mean position

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None of these

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Between mean and extreme position

Question 16

16. The frequency of second pendulum is

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None of these

Question 17

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

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The potential energy is maximum at the mean position

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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

Question 18

18. 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 19

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

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Reduce the mass to one-fourth

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Half the mass

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Quadruple the mass

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Double the mass

Question 20

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

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The length of the pendulum is decreased

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The length of the pendulum is increased

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The mass of the pendulum is decreased

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The mass of the pendulum is increased

Question 21

21. 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

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Rotatory motion

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Periodic motion

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Wave motion

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Rectilinear motion

Question 22

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

Question 23

23. Frequency is the term used for

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Number of vibration for second

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Time to take one Vibration

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None of these

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Number of vibrations per minute

Question 24

24. The kinetic energy is maximum when mass at equilibrium

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P.E.max 1.2 KX²

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P.E.max 1.2 K² X

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P.E.max 1.2 KX₀²

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None of these

Question 25

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

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Quality factor is small

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Applied periodic force is small

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Damping force is small

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Restoring force is small

Question 26

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

Question 27

27. The body oscillates due to a

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Applied force

Answer

None of these

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Frictional force

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Restoring force

Question 28

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

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The length of the pendulum is decreased

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The mass of the pendulum is increased

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The length of the pendulum is increased

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The mass of the pendulum is decreased

Question 29

29. Forced vibration are known as

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Free vibration

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Simple harmonic vibration

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Natural vibration

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Driven harmonic vibration

Question 30

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

Question 31

31. A simple pendulum is defined as

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Small heavy mass

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Light inextensible string

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All of these

Answer

Friction less support

Question 32

32. Identify the exact statement among the following:

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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°.

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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.

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

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

Question 33

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

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Vp sin (90° - θ)

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X₀ ω cos θ

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All of these

Question 34

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

Answer

P.E. = ½ KX²

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P.E. = ½ KX₀²

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P.E. = ½ K²X²

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None of these

Question 35

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

Question 36

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

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Becomes zero

Answer

Remains constant

Question 37

37. 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 38

38. 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

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Become infinite

Question 39

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

Answer

Crossing mean position

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Displacement is maximum

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Half way between them

Question 40

40. In simple harmonic motion

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

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The velocity and displacement if 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.

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

Question 41

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

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Mean position

Answer

Extreme position

Answer

Both a and b

Question 42

42. The damped oscillations are produced due to

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System friction

Answer

Frictional support of the system

Answer

All of these

Answer

Air resistance

Question 43

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

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Natural frequency

Answer

None of these

Answer

Minimum frequency

Answer

Maximum frequency

Question 44

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

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Tension is string

Answer

None of these

Answer

Drag force of air

Question 45

45. In vibratory motion which parameter remains constant?

Answer

Angular Momentum

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Total Energy

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K.E. Energy

Answer

P.E. Energy

Question 46

46. Natural frequency of simple pendulum depends upon

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Square of its length

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Its length

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Square root of its length

Question 47

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

Question 48

48. The energy of the oscillation comes from the

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Starting source

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Applied force

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Driving source

Answer

None of these

Question 49

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

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V = r² – x²

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V = √r² – x²

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V = ω√r² – x²

Answer

None of these

Question 50

50. Oscillatory motion is a type of motion which is

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To and fro

Answer

All of these

Answer

Periodic motions

Answer

Vibratory motion

Question 51

51. Phase of SHM describes

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Displacement only

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Neither displacement nor direction of motion

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Both displacement and direction of motion

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Direction of motion only

Question 52

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

Answer

All of these

Question 53

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

Question 54

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

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Independent of x

Question 55

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

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Kinetic energy is maximum, potential energy is minimum

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Kinetic energy is minimum, potential energy is maximum

Answer

Both kinetic and potential energies are maximum

Answer

Both kinetic and potential energies are minimum

Question 56

56. Restoring force is defined as

Question 57

57. The vibrating bodies produce

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All of these

Answer

Disturbance

Question 58

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

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Maximum as well minimum

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Minimum only

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Maximum only

Question 59

59. 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 60

60. The waveform of simple harmonic motion will be

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Square wave

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None of these

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Saw tooth waveform

Question 61

61. The damping depends upon

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None of these

Question 62

62. 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

Angular frequency, Acceleration, force

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Total energy, amplitude, angular frequency

Answer

Amplitude, angular frequency, acceleration

Question 63

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

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

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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.

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

Question 64

64. Turning of a radio set is an example of

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Musical resonance

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Free vibration

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Mechanical resonance

Answer

Electrical resonance

Answer 177

P.E. remains constant

Answer 178

Total momentum remain constant

Answer 179

Total energy remain constant

Answer 180

K.E. remain constant

Answer 181

Circular Motion

Answer 182

Simple Harmonic Motion

Answer 183

Angular Motion

Answer 184

Rectilinear Motion

Answer 185

Force constant

Answer 186

First A then B

Answer 187

Remain the same

Answer 188

Oscillation

Answer 189

Powerful vibration

Answer 190

Free vibrations

Answer 191

None of these

Answer 192

Forced vibration

Answer 193

Become on fourth

Answer 194

Becomes one half

Answer 195

Becomes Double

Answer 196

Remains same

Answer 197

4 x amplitude

Answer 198

2 x amplitude

Answer 199

Square of amplitude

Answer 200

2π second

Answer 201

4π second

Answer 202

Vibration S¯²

Answer 203

Time period will not change

Answer 204

Time period will decrease

Answer 205

Time period will increase

Answer 206

Time period will depend on the weight of the boy.

Answer 207

None of these

Answer 208

-mg cos θ

Answer 209

-mg sin θ

Answer 210

On stretching s spring

Answer 211

One the rising of an air bubble in water

Answer 212

On compressing a spring

Answer 213

On moving a body against gravitational force

Answer 214

Wavelength of the various bodies

Answer 215

None of these

Answer 216

Amplitudes of the various bodies

Answer 217

Wavelength of the various bodies

Answer 218

Difference between kinetic energy and potential energy

Answer 219

Potential energy

Answer 220

Phase difference between acceleration and displacement

Answer 221

Becomes zero

Answer 222

Remains constant

Answer 223

F and X are inverse proportional

Answer 224

None of these

Answer 225

F and X has no relation

Answer 226

F and X are direct proportional

Answer 227

Acceleration is directed towards the mean position

Answer 228

All of these

Answer 229

Acceleration produced is due to restoring force

Answer 230

Acceleration is directly proportional to displacement

Answer 231

Mean Position

Answer 232

Both a and b

Answer 233

Extreme Position

Answer 234

Ball bouncing between two rigid vertical walls

Answer 235

Earth spinning about its own axis

Answer 236

Wave moving through a string fixed at both ends.

Answer 237

Particle moving in a circle with uniform speed.

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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