Physics Oscillations Online Mcqs Test

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Question 1

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

Answer

Amplitudes of the various bodies

Answer

Wavelength of the various bodies

Answer

Wavelength of the various bodies

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None of these

Question 2

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

Answer

Becomes one half

Answer

Become on fourth

Answer

Becomes Double

Answer

Remains same

Question 3

3. 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)/2

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√k₁ k₂

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k₁ + k₂

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k₁ k₂/( k₁ + k₂)

Question 4

4. A simple pendulum is defined as

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Small heavy mass

Answer

Light inextensible string

Answer

All of these

Answer

Friction less support

Question 5

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

Answer

P.E. = ½ KX₀²

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P.E. = ½ KX²

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None of these

Answer

P.E. = ½ K²X²

Question 6

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

Answer

Double the mass

Answer

Quadruple the mass

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Reduce the mass to one-fourth

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Half the mass

Question 7

7. 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

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

Question 8

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

Question 9

9. The body oscillates due to a

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Restoring force

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Frictional force

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Applied force

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None of these

Question 10

10. The vibrating bodies produce

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Disturbance

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All of these

Question 11

11. Turning of a radio set is an example of

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Electrical resonance

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Mechanical resonance

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Musical resonance

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Free vibration

Question 12

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

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Quadruple the mass

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Half the mass

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Reduce the mass to one fourth

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Double the mass

Question 13

13. Oscillatory motion is a type of motion which is

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To and fro

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Vibratory motion

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Periodic motions

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All of these

Question 14

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

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Free vibrations

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Forced vibration

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None of these

Answer

Powerful vibration

Question 15

15. 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?

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Time period will depend on the weight of the boy.

Answer

Time period will decrease

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Time period will increase

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Time period will not change

Question 16

16. If the metal bob in a simple pendulum is replaced by a wooden bob, then its time period will

Answer

First A then B

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Remain the same

Question 17

17. 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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Periodic motion

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Rotatory motion

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Wave motion

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Rectilinear motion

Question 18

18. Simple harmonic motion is mathematically represented as

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A α – x

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V α – x

Answer

F α – x

Question 19

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

Answer

Maximum only

Answer

Minimum only

Answer

Maximum as well minimum

Question 20

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

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Applied periodic force is small

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Restoring force is small

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Quality factor is small

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Damping force is small

Question 21

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

Answer

Extra ordinarily large

Question 22

22. Forced vibration are known as

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Simple harmonic vibration

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Natural vibration

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Free vibration

Answer

Driven harmonic vibration

Question 23

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

Answer

All of these

Answer

X₀ ω cos θ

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Vp sin (90° - θ)

Question 24

24. 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

Become infinite

Answer

Remain unaffected

Question 25

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

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4 x amplitude

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Square of amplitude

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2 x amplitude

Question 26

26. In vibratory motion

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Total energy remain constant

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K.E. remain constant

Answer

Total momentum remain constant

Answer

P.E. remains constant

Question 27

27. A simple harmonic motion in which the

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Acceleration is directed towards the mean position

Answer

Acceleration produced is due to restoring force

Answer

All of these

Answer

Acceleration is directly proportional to displacement

Question 28

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

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Remains constant

Answer

Becomes zero

Question 29

29. The damped oscillations are produced due to

Answer

All of these

Answer

Air resistance

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System friction

Answer

Frictional support of the system

Question 30

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

Answer

The potential energy is maximum at the mean position

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The acceleration is minimum at the mean position

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The kinetic energy is maximum at the mean position

Answer

The force on the particle is maximum at the ends

Question 31

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

Question 32

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

Question 33

33. Restoring force is defined as

Question 34

34. 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 35

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

Question 36

36. In vibratory motion which parameter remains constant?

Answer

Total Energy

Answer

P.E. Energy

Answer

K.E. Energy

Answer

Angular Momentum

Question 37

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

Answer

Ball bouncing between two rigid vertical walls

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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 38

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

Answer

Oscillation

Question 39

39. The frequency of second pendulum is

Answer

None of these

Question 40

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

Question 41

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

Answer

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

Answer

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

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

Question 42

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

Question 43

43. In which case does the potential energy decreases?

Answer

On compressing a spring

Answer

On stretching s spring

Answer

One the rising of an air bubble in water

Answer

On moving a body against gravitational force

Question 44

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

Answer

An ellipse

Answer

A hyperbola

Answer

A straight line

Question 45

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

Answer

2π second

Answer

4π second

Question 46

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

Answer

Mean Position

Answer

Extreme Position

Answer

Both a and b

Question 47

47. The restoring force applied on the pendulum

Answer

-mg cos θ

Answer

-mg sin θ

Question 48

48. 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 decreased

Answer

The length of the pendulum is increased

Answer

The mass of the pendulum is increased

Answer

The length of the pendulum is decreased

Question 49

49. 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 50

50. 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

Time period

Answer

Doppler’s effect

Question 51

51. The waveform of simple harmonic motion will be

Answer

Saw tooth waveform

Answer

Square wave

Answer

None of these

Question 52

52. The relation for the displacement in SHM is

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X = X₀ cos (ωt + φ)

Answer

X = X₀ cos ωt

Answer

None of these

Answer

X = X₀ sin ωt

Question 53

53. In simple harmonic motion

Answer

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

Question 54

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

Answer

Minimum frequency

Answer

None of these

Answer

Natural frequency

Answer

Maximum frequency

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

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The force on the particle is maximum at the ends

Answer

The potential energy is maximum at the mean position

Answer

The acceleration is minimum at the mean position

Question 56

56. Frequency is the term used for

Answer

None of these

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Number of vibration for second

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Time to take one Vibration

Answer

Number of vibrations per minute

Question 57

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

Answer

Mean position

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Between mean and extreme position

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Extreme position

Answer

None of these

Question 58

58. In which of the following lists are all three quantities constant when a particle moves in undamped simple harmonic motion?

Answer

Total energy, amplitude, angular frequency

Answer

Angular frequency, Acceleration, force

Answer

Amplitude, angular frequency, acceleration

Answer

Acceleration, force, total energy

Question 59

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

Answer

Half way between them

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Displacement is maximum

Answer

Crossing mean position

Question 60

60. 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 61

61. Hook’s law is defined as

Answer

None of these

Answer

F and X are inverse proportional

Answer

F and X has no relation

Answer

F and X are direct proportional

Question 62

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

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Tension is string

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Drag force of air

Answer

None of these

Question 63

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

Answer

Three times

Answer

Four times

Answer

Nine times

Question 64

64. The damping depends upon

Answer

None of these

Answer 188

Extreme position

Answer 189

Both a and b

Answer 190

Mean position

Answer 191

Square of its length

Answer 192

Its length

Answer 193

Square root of its length

Answer 194

All of these

Answer 195

From means position to back to its means position

Answer 196

Means position to upper extreme position

Answer 197

From extreme position

Answer 198

Maximum in the extreme position

Answer 199

None of these

Answer 200

Zero in the mean position

Answer 201

Remains constant

Answer 202

Becomes zero

Answer 203

Starting source

Answer 204

None of these

Answer 205

Applied force

Answer 206

Driving source

Answer 207

Displacement only

Answer 208

Neither displacement nor direction of motion

Answer 209

Both displacement and direction of motion

Answer 210

Direction of motion only

Answer 211

The length of the pendulum is decreased

Answer 212

The mass of the pendulum is increased

Answer 213

The mass of the pendulum is decreased

Answer 214

The length of the pendulum is increased

Answer 215

None of these

Answer 216

Becomes zero

Answer 217

Remains constant

Answer 218

Vibration S¯²

Answer 219

Kinetic energy is maximum, potential energy is minimum

Answer 220

Both kinetic and potential energies are minimum

Answer 221

Kinetic energy is minimum, potential energy is maximum

Answer 222

Both kinetic and potential energies are maximum

Answer 223

Force constant

Answer 224

Circular Motion

Answer 225

Angular Motion

Answer 226

Simple Harmonic Motion

Answer 227

Rectilinear Motion

Answer 228

P.E.max 1.2 KX₀²

Answer 229

None of these

Answer 230

P.E.max 1.2 KX²

Answer 231

P.E.max 1.2 K² X

Answer 232

All of these

Answer 233

V = ω√r² – x²

Answer 234

V = √r² – x²

Answer 235

V = r² – x²

Answer 236

None of these

Answer 237

Independent of x

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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