Physics Oscillations Online Mcqs Test

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Question 1

1. 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

Potential energy

Answer

Phase difference between acceleration and displacement

Question 2

2. Phase of SHM describes

Answer

Neither displacement nor direction of motion

Answer

Displacement only

Answer

Both displacement and direction of motion

Answer

Direction of motion only

Question 3

3. The waves produced in microwave oven have a wavelength

Question 4

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

Question 5

5. In vibratory motion

Answer

K.E. remain constant

Answer

P.E. remains constant

Answer

Total energy remain constant

Answer

Total momentum remain constant

Question 6

6. The damped oscillations are produced due to

Answer

Air resistance

Answer

System friction

Answer

Frictional support of the system

Answer

All of these

Question 7

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

Answer

None of these

Answer

Wavelength of the various bodies

Answer

Amplitudes of the various bodies

Answer

Wavelength of the various bodies

Question 8

8. Simple harmonic motion is mathematically represented as

Answer

F α – x

Answer

A α – x

Answer

V α – x

Question 9

9. The restoring force applied on the pendulum

Answer

-mg sin θ

Answer

-mg cos θ

Question 10

10. 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

Periodic motion

Answer

Rectilinear motion

Answer

Rotatory motion

Answer

Wave motion

Question 11

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

Answer

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

Answer

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

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

Question 12

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

Answer

Ball bouncing between two rigid vertical walls

Answer

Particle moving in a circle with uniform speed.

Answer

Wave moving through a string fixed at both ends.

Answer

Earth spinning about its own axis

Question 13

13. 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 14

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

Question 15

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

Answer

Nine times

Answer

Four times

Answer

Three times

Question 16

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

Answer

None of these

Answer

P.E. = ½ K²X²

Answer

P.E. = ½ KX₀²

Answer

P.E. = ½ KX²

Question 17

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

Answer

Kinetic energy is minimum, potential energy is maximum

Answer

Kinetic energy is maximum, potential energy is minimum

Answer

Both kinetic and potential energies are minimum

Answer

Both kinetic and potential energies are maximum

Question 18

18. 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 mass of the pendulum is decreased

Answer

The length of the pendulum is decreased

Question 19

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

Answer

Becomes zero

Answer

Remains constant

Question 20

20. The relation for the displacement in SHM is

Answer

None of these

Answer

X = X₀ sin ωt

Answer

X = X₀ cos ωt

Answer

X = X₀ cos (ωt + φ)

Question 21

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

Answer

Applied periodic force is small

Answer

Quality factor is small

Answer

Restoring force is small

Answer

Damping force is small

Question 22

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

Answer

An ellipse

Answer

A straight line

Answer

A hyperbola

Question 23

23. 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 24

24. 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 25

25. A simple pendulum is defined as

Answer

Small heavy mass

Answer

Light inextensible string

Answer

Friction less support

Answer

All of these

Question 26

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

Answer

Oscillation

Question 27

27. The damping depends upon

Answer

None of these

Question 28

28. The body oscillates due to a

Answer

Restoring force

Answer

Frictional force

Answer

Applied force

Answer

None of these

Question 29

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

Answer

Becomes zero

Answer

Remains constant

Question 30

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

Answer

All of these

Question 31

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

Answer

4 x amplitude

Answer

Square of amplitude

Answer

2 x amplitude

Question 32

32. The frequency of second pendulum is

Answer

None of these

Question 33

33. The waveform of simple harmonic motion will be

Answer

Saw tooth waveform

Answer

None of these

Answer

Square wave

Question 34

34. Natural frequency of simple pendulum depends upon

Answer

Square root of its length

Answer

Its length

Answer

Square of its length

Question 35

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

Question 36

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

Question 37

37. 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 38

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

Answer

Force constant

Question 39

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

Answer

Powerful vibration

Answer

Free vibrations

Answer

Forced vibration

Answer

None of these

Question 40

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

Answer

From means position to back to its means position

Answer

From extreme position

Answer

All of these

Answer

Means position to upper extreme position

Question 41

41. Identify the exact statement among the following:

Answer

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

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

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

Question 42

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

Question 43

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

Answer

Independent of x

Question 44

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

Question 45

45. 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 46

46. Turning of a radio set is an example of

Answer

Musical resonance

Answer

Electrical resonance

Answer

Mechanical resonance

Answer

Free vibration

Question 47

47. Frequency is the term used for

Answer

None of these

Answer

Time to take one Vibration

Answer

Number of vibration for second

Answer

Number of vibrations per minute

Question 48

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

Answer

Remains constant

Answer

Becomes zero

Question 49

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

Answer

V = ω√r² – x²

Answer

V = √r² – x²

Answer

None of these

Answer

V = r² – x²

Question 50

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

Answer

Extreme Position

Answer

Mean Position

Answer

Both a and b

Question 51

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

Answer

2π second

Answer

4π second

Question 52

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

Answer

Become on fourth

Answer

Remains same

Answer

Becomes one half

Answer

Becomes Double

Question 53

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

Answer

Maximum in the extreme position

Answer

None of these

Answer

Zero in the mean position

Question 54

54. The kinetic energy is maximum when mass at equilibrium

Answer

P.E.max 1.2 KX²

Answer

P.E.max 1.2 KX₀²

Answer

P.E.max 1.2 K² X

Answer

None of these

Question 55

55. In which case does the potential energy decreases?

Answer

One the rising of an air bubble in water

Answer

On stretching s spring

Answer

On compressing a spring

Answer

On moving a body against gravitational force

Question 56

56. Oscillatory motion is a type of motion which is

Answer

All of these

Answer

To and fro

Answer

Periodic motions

Answer

Vibratory motion

Question 57

57. 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 58

58. Forced vibration are known as

Answer

Natural vibration

Answer

Driven harmonic vibration

Answer

Simple harmonic vibration

Answer

Free vibration

Question 59

59. S.I unit of frequency is

Answer

Vibration S¯²

Question 60

60. A simple harmonic motion in which the

Answer

Acceleration is directly proportional to displacement

Answer

All of these

Answer

Acceleration is directed towards the mean position

Answer

Acceleration produced is due to restoring force

Question 61

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

Answer

The force on the particle is maximum at the ends

Answer

The acceleration is minimum at the mean position

Answer

The kinetic energy is maximum at the mean position

Answer

The potential energy is maximum at the mean position

Question 62

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

Answer

Between mean and extreme position

Answer

None of these

Answer

Mean position

Answer

Extreme position

Question 63

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

Answer

Reduce the mass to one fourth

Answer

Double the mass

Answer

Quadruple the mass

Answer

Half the mass

Question 64

64. 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 decrease

Answer

Time period will increase

Answer

Time period will not change

Answer

Time period will depend on the weight of the boy.

Answer 181

Drag force of air

Answer 182

None of these

Answer 183

Tension is string

Answer 184

K.E. Energy

Answer 185

Angular Momentum

Answer 186

Total Energy

Answer 187

P.E. Energy

Answer 188

All of these

Answer 189

Disturbance

Answer 190

Remain the same

Answer 191

First A then B

Answer 192

None of these

Answer 193

None of these

Answer 194

Starting source

Answer 195

Driving source

Answer 196

Applied force

Answer 197

Half way between them

Answer 198

Displacement is maximum

Answer 199

Crossing mean position

Answer 200

Rectilinear Motion

Answer 201

Simple Harmonic Motion

Answer 202

Angular Motion

Answer 203

Circular Motion

Answer 204

k₁ + k₂

Answer 205

k₁ k₂/( k₁ + k₂)

Answer 206

(k₁ + k₂)/2

Answer 207

√k₁ k₂

Answer 208

Reduce the mass to one-fourth

Answer 209

Quadruple the mass

Answer 210

Double the mass

Answer 211

Half the mass

Answer 212

Extreme position

Answer 213

Both a and b

Answer 214

Mean position

Answer 215

Vp sin (90° - θ)

Answer 216

All of these

Answer 217

X₀ ω cos θ

Answer 218

None of these

Answer 219

F and X are direct proportional

Answer 220

F and X are inverse proportional

Answer 221

F and X has no relation

Answer 222

The length of the pendulum is decreased

Answer 223

The mass of the pendulum is increased

Answer 224

The mass of the pendulum is decreased

Answer 225

The length of the pendulum is increased

Answer 226

Extra ordinarily large

Answer 227

The potential energy is maximum at the mean position

Answer 228

The kinetic energy is maximum at the mean position

Answer 229

The acceleration is minimum at the mean position

Answer 230

The force on the particle is maximum at the ends

Answer 231

None of these

Answer 232

Natural frequency

Answer 233

Maximum frequency

Answer 234

Minimum frequency

Answer 235

Minimum only

Answer 236

Maximum as well minimum

Answer 237

Maximum only

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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