Physics Oscillations Online Mcqs Test

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Question 1

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

Answer

Double the mass

Answer

Half the mass

Answer

Quadruple the mass

Answer

Reduce the mass to one fourth

Question 2

2. 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

Doppler’s effect

Answer

Time period

Answer

Wavelength

Question 3

3. Oscillatory motion is a type of motion which is

Answer

Vibratory motion

Answer

To and fro

Answer

Periodic motions

Answer

All of these

Question 4

4. In vibratory motion which parameter remains constant?

Answer

K.E. Energy

Answer

Total Energy

Answer

P.E. Energy

Answer

Angular Momentum

Question 5

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

Answer

P.E. = ½ KX²

Answer

None of these

Answer

P.E. = ½ K²X²

Answer

P.E. = ½ KX₀²

Question 6

6. The frequency of second pendulum is

Answer

None of these

Question 7

7. 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/( k₁ + k₂)

Answer

k₁ + k₂

Answer

√k₁ k₂

Answer

(k₁ + k₂)/2

Question 8

8. 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 potential energy is maximum at the mean position

Answer

The force on the particle is maximum at the ends

Answer

The acceleration is minimum at the mean position

Question 9

9. 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 10

10. 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 decrease

Answer

Time period will depend on the weight of the boy.

Question 11

11. Hook’s law is defined as

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F and X are direct proportional

Answer

None of these

Answer

F and X has no relation

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F and X are inverse proportional

Question 12

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

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Becomes zero

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Remains constant

Question 13

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

Answer

Force constant

Question 14

14. Frequency is the term used for

Answer

Number of vibrations per minute

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Time to take one Vibration

Answer

None of these

Answer

Number of vibration for second

Question 15

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

Answer

None of these

Answer

V = r² – x²

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V = ω√r² – x²

Answer

V = √r² – x²

Question 16

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

Question 17

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

Answer

Kinetic energy is maximum, potential energy is minimum

Answer

Both kinetic and potential energies are minimum

Answer

Kinetic energy is minimum, potential energy is maximum

Answer

Both kinetic and potential energies are maximum

Question 18

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

Answer

Quadruple the mass

Answer

Half the mass

Answer

Double the mass

Answer

Reduce the mass to one-fourth

Question 19

19. The damped oscillations are produced due to

Answer

System friction

Answer

Frictional support of the system

Answer

Air resistance

Answer

All of these

Question 20

20. The waves produced in microwave oven have a wavelength

Question 21

21. A simple pendulum is defined as

Answer

Light inextensible string

Answer

Friction less support

Answer

All of these

Answer

Small heavy mass

Question 22

22. The vibrating bodies produce

Answer

Disturbance

Answer

All of these

Question 23

23. 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

Answer

Phase difference between acceleration and displacement

Answer

Difference between kinetic energy and potential energy

Question 24

24. Turning of a radio set is an example of

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Musical resonance

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Electrical resonance

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Free vibration

Answer

Mechanical resonance

Question 25

25. The energy of the oscillation comes from the

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Driving source

Answer

None of these

Answer

Applied force

Answer

Starting source

Question 26

26. 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 27

27. 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 28

28. Phase of SHM describes

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Direction of motion only

Answer

Displacement only

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Both displacement and direction of motion

Answer

Neither displacement nor direction of motion

Question 29

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

Answer

Independent of x

Question 30

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

Answer

Forced vibration

Answer

Free vibrations

Answer

None of these

Answer

Powerful vibration

Question 31

31. In vibratory motion

Answer

P.E. remains constant

Answer

K.E. remain constant

Answer

Total energy remain constant

Answer

Total momentum remain constant

Question 32

32. 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 33

33. 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 always ω²x₀ and its directed at right angles to its motion

Answer

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

Answer

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

Question 34

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

Answer

All of these

Answer

Water molecules

Answer

Fat molecules

Question 35

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

Question 36

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

Answer

Oscillation

Question 37

37. 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 38

38. Forced vibration are known as

Answer

Free vibration

Answer

Driven harmonic vibration

Answer

Natural vibration

Answer

Simple harmonic vibration

Question 39

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

Question 40

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

Answer

All of these

Answer

Means position to upper extreme position

Answer

From means position to back to its means position

Answer

From extreme position

Question 41

41. 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

Amplitude, angular frequency, acceleration

Answer

Acceleration, force, total energy

Answer

Total energy, amplitude, angular frequency

Question 42

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

Question 43

43. The damping depends upon

Answer

None of these

Question 44

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

Question 45

45. The relation for the displacement in SHM is

Answer

None of these

Answer

X = X₀ cos ωt

Answer

X = X₀ sin ωt

Answer

X = X₀ cos (ωt + φ)

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

Rectilinear motion

Answer

Rotatory motion

Answer

Wave motion

Answer

Periodic motion

Question 47

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

Answer

Maximum only

Answer

Maximum as well minimum

Answer

Minimum only

Question 48

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

Answer

Damping force is small

Answer

Applied periodic force is small

Answer

Restoring force is small

Answer

Quality factor is small

Question 49

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

Answer

Maximum in the extreme position

Answer

Zero in the mean position

Answer

None of these

Question 50

50. The waveform of simple harmonic motion will be

Answer

None of these

Answer

Saw tooth waveform

Answer

Square wave

Question 51

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

Answer

Tension is string

Answer

None of these

Answer

Drag force of air

Question 52

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

Answer

Remains constant

Answer

Becomes zero

Question 53

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

Answer

Extra ordinarily large

Question 54

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

Question 55

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

Answer

Angular Motion

Answer

Rectilinear Motion

Answer

Simple Harmonic Motion

Answer

Circular Motion

Question 56

56. 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 57

57. The kinetic energy is maximum when mass at equilibrium

Answer

P.E.max 1.2 K² X

Answer

None of these

Answer

P.E.max 1.2 KX²

Answer

P.E.max 1.2 KX₀²

Question 58

58. In simple harmonic motion

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.

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.

Question 59

59. The body oscillates due to a

Answer

Frictional force

Answer

Applied force

Answer

None of these

Answer

Restoring force

Question 60

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

Answer

Becomes zero

Answer

Remains constant

Question 61

61. Natural frequency of simple pendulum depends upon

Answer

Its length

Answer

Square of its length

Answer

Square root of its length

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 length of the pendulum is decreased

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The mass of the pendulum is increased

Answer

The mass of the pendulum is decreased

Answer

The length of the pendulum is increased

Question 63

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

Answer

Extreme position

Answer

Mean position

Answer

Both a and b

Question 64

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

Answer

All of these

Answer 179

Remain unaffected

Answer 180

Become infinite

Answer 181

Wave moving through a string fixed at both ends.

Answer 182

Particle moving in a circle with uniform speed.

Answer 183

Earth spinning about its own axis

Answer 184

Ball bouncing between two rigid vertical walls

Answer 185

Both a and b

Answer 186

Extreme Position

Answer 187

Mean Position

Answer 188

4π second

Answer 189

2π second

Answer 190

Nine times

Answer 191

Four times

Answer 192

Three times

Answer 193

V α – x

Answer 194

F α – x

Answer 195

A α – x

Answer 196

Wavelength of the various bodies

Answer 197

Amplitudes of the various bodies

Answer 198

Wavelength of the various bodies

Answer 199

None of these

Answer 200

None of these

Answer 201

Natural frequency

Answer 202

None of these

Answer 203

Minimum frequency

Answer 204

Maximum frequency

Answer 205

Extreme position

Answer 206

Mean position

Answer 207

None of these

Answer 208

Between mean and extreme position

Answer 209

On compressing a spring

Answer 210

On stretching s spring

Answer 211

On moving a body against gravitational force

Answer 212

One the rising of an air bubble in water

Answer 213

Remains same

Answer 214

Become on fourth

Answer 215

Becomes Double

Answer 216

Becomes one half

Answer 217

Vibration S¯²

Answer 218

-mg cos θ

Answer 219

-mg sin θ

Answer 220

The mass of the pendulum is decreased

Answer 221

The length of the pendulum is decreased

Answer 222

The length of the pendulum is increased

Answer 223

The mass of the pendulum is increased

Answer 224

The force on the particle is maximum at the ends

Answer 225

The kinetic energy is maximum at the mean position

Answer 226

The acceleration is minimum at the mean position

Answer 227

The potential energy is maximum at the mean position

Answer 228

Acceleration is directed towards the mean position

Answer 229

Acceleration produced is due to restoring force

Answer 230

Acceleration is directly proportional to displacement

Answer 231

All of these

Answer 232

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

Answer 233

The fractional change in the time period of a pendulum on changing the temperature is independent of the length of the pendulum.

Answer 234

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 235

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

Answer 236

First A then B

Answer 237

Remain the same

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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