Physics Oscillations Online Mcqs Test

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Question 1

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

Answer

Extra ordinarily large

Question 2

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

Answer

None of these

Answer

P.E. = ½ KX²

Answer

P.E. = ½ KX₀²

Answer

P.E. = ½ K²X²

Question 3

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

Answer

V = √r² – x²

Answer

V = ω√r² – x²

Answer

None of these

Answer

V = r² – x²

Question 4

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

Answer

Amplitudes of the various bodies

Answer

Wavelength of the various bodies

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None of these

Answer

Wavelength of the various bodies

Question 5

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

Answer

Independent of x

Question 6

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

Answer

Quadruple the mass

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Reduce the mass to one fourth

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Half the mass

Answer

Double the mass

Question 7

7. Hook’s law is defined as

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F and X has no relation

Answer

F and X are inverse proportional

Answer

F and X are direct proportional

Answer

None of these

Question 8

8. 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 decreased

Answer

The mass of the pendulum is decreased

Answer

The length of the pendulum is increased

Question 9

9. 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)/2

Answer

k₁ k₂/( k₁ + k₂)

Question 10

10. 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

Phase difference between acceleration and displacement

Answer

Difference between kinetic energy and potential energy

Answer

Potential energy

Question 11

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

Answer

Simple Harmonic Motion

Answer

Angular Motion

Answer

Circular Motion

Answer

Rectilinear Motion

Question 12

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

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Double the mass

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Half the mass

Answer

Reduce the mass to one-fourth

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Quadruple the mass

Question 13

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

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Drag force of air

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None of these

Answer

Tension is string

Question 14

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

Answer

Water molecules

Answer

Fat molecules

Answer

All of these

Question 15

15. 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 16

16. 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 17

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

Question 18

18. 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 19

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

Question 20

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

Question 21

21. Frequency is the term used for

Answer

Time to take one Vibration

Answer

None of these

Answer

Number of vibrations per minute

Answer

Number of vibration for second

Question 22

22. The damping depends upon

Answer

None of these

Question 23

23. Turning of a radio set is an example of

Answer

Mechanical resonance

Answer

Free vibration

Answer

Musical resonance

Answer

Electrical resonance

Question 24

24. 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 25

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

Question 26

26. Natural frequency of simple pendulum depends upon

Answer

Its length

Answer

Square root of its length

Answer

Square of its length

Question 27

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

Question 28

28. 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 29

29. Identify the exact statement among the following:

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 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.

Question 30

30. The frequency of second pendulum is

Answer

None of these

Question 31

31. 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 32

32. The waves produced in microwave oven have a wavelength

Question 33

33. 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

Total energy, amplitude, angular frequency

Answer

Angular frequency, Acceleration, force

Answer

Amplitude, angular frequency, acceleration

Question 34

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

Answer

Becomes zero

Answer

Remains constant

Question 35

35. In vibratory motion which parameter remains constant?

Answer

P.E. Energy

Answer

K.E. Energy

Answer

Total Energy

Answer

Angular Momentum

Question 36

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

Answer

A straight line

Answer

An ellipse

Answer

A hyperbola

Question 37

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

Question 38

38. 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 39

39. Restoring force is defined as

Question 40

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

Question 41

41. Simple harmonic motion is mathematically represented as

Answer

A α – x

Answer

V α – x

Answer

F α – x

Question 42

42. The kinetic energy is maximum when mass at equilibrium

Answer

P.E.max 1.2 KX²

Answer

P.E.max 1.2 KX₀²

Answer

None of these

Answer

P.E.max 1.2 K² X

Question 43

43. 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 not change

Answer

Time period will depend on the weight of the boy.

Answer

Time period will decrease

Question 44

44. 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 45

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

Answer

Mean position

Answer

Extreme position

Answer

Between mean and extreme position

Answer

None of these

Question 46

46. 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 47

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

Answer

Force constant

Question 48

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

Answer

Maximum as well minimum

Answer

Maximum only

Answer

Minimum only

Question 49

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

Answer

Becomes zero

Answer

Remains constant

Question 50

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

Answer

Four times

Answer

Nine times

Answer

Three times

Question 51

51. S.I unit of frequency is

Answer

Vibration S¯²

Question 52

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

Answer

From means position to back to its means position

Answer

All of these

Answer

Means position to upper extreme position

Answer

From extreme position

Question 53

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

Answer

Extreme position

Answer

Mean position

Answer

Both a and b

Question 54

54. 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 55

55. 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 potential energy is maximum at the mean position

Answer

The force on the particle is maximum at the ends

Question 56

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

Answer

Earth spinning about its own axis

Answer

Particle moving in a circle with uniform speed.

Answer

Ball bouncing between two rigid vertical walls

Answer

Wave moving through a string fixed at both ends.

Question 57

57. Phase of SHM describes

Answer

Displacement only

Answer

Direction of motion only

Answer

Both displacement and direction of motion

Answer

Neither displacement nor direction of motion

Question 58

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

Answer

4π second

Answer

2π second

Question 59

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

Answer

Displacement is maximum

Answer

Crossing mean position

Answer

Half way between them

Question 60

60. The vibrating bodies produce

Answer

Disturbance

Answer

All of these

Question 61

61. A simple pendulum is defined as

Answer

All of these

Answer

Friction less support

Answer

Small heavy mass

Answer

Light inextensible string

Question 62

62. 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 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

Question 63

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

Question 64

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

Answer

Zero in the mean position

Answer

None of these

Answer

Maximum in the extreme position

Answer 167

Becomes one half

Answer 168

Remains same

Answer 169

Become on fourth

Answer 170

Becomes Double

Answer 171

Becomes zero

Answer 172

Remains constant

Answer 173

Acceleration produced is due to restoring force

Answer 174

Acceleration is directed towards the mean position

Answer 175

Acceleration is directly proportional to displacement

Answer 176

All of these

Answer 177

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

Answer 178

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

Answer 179

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

Answer 180

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

Answer 181

The mass of the pendulum is decreased

Answer 182

The length of the pendulum is decreased

Answer 183

The length of the pendulum is increased

Answer 184

The mass of the pendulum is increased

Answer 185

Frictional support of the system

Answer 186

System friction

Answer 187

All of these

Answer 188

Air resistance

Answer 189

None of these

Answer 190

X₀ ω cos θ

Answer 191

All of these

Answer 192

Vp sin (90° - θ)

Answer 193

Applied force

Answer 194

None of these

Answer 195

Starting source

Answer 196

Driving source

Answer 197

None of these

Answer 198

X = X₀ cos ωt

Answer 199

X = X₀ cos (ωt + φ)

Answer 200

X = X₀ sin ωt

Answer 201

Both a and b

Answer 202

Extreme Position

Answer 203

Mean Position

Answer 204

To and fro

Answer 205

All of these

Answer 206

Vibratory motion

Answer 207

Periodic motions

Answer 208

Simple harmonic vibration

Answer 209

Free vibration

Answer 210

Natural vibration

Answer 211

Driven harmonic vibration

Answer 212

None of these

Answer 213

Forced vibration

Answer 214

Free vibrations

Answer 215

Powerful vibration

Answer 216

P.E. remains constant

Answer 217

Total momentum remain constant

Answer 218

K.E. remain constant

Answer 219

Total energy remain constant

Answer 220

All of these

Answer 221

None of these

Answer 222

Saw tooth waveform

Answer 223

Square wave

Answer 224

Oscillation

Answer 225

Square of amplitude

Answer 226

4 x amplitude

Answer 227

2 x amplitude

Answer 228

Both kinetic and potential energies are maximum

Answer 229

Both kinetic and potential energies are minimum

Answer 230

Kinetic energy is minimum, potential energy is maximum

Answer 231

Kinetic energy is maximum, potential energy is minimum

Answer 232

-mg cos θ

Answer 233

-mg sin θ

Answer 234

Minimum frequency

Answer 235

Maximum frequency

Answer 236

Natural frequency

Answer 237

None of these

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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