Physics Oscillations Online Mcqs Test

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Question 1

1. 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 2

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

Answer

Remains constant

Answer

Becomes zero

Question 3

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

Question 4

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

Answer

Maximum as well minimum

Answer

Minimum only

Answer

Maximum only

Question 5

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

Answer

Nine times

Answer

Three times

Answer

Four times

Question 6

6. 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 maximum

Answer

Kinetic energy is minimum, potential energy is maximum

Answer

Both kinetic and potential energies are minimum

Question 7

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

Answer

Extra ordinarily large

Question 8

8. Restoring force is defined as

Question 9

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

Answer

Maximum frequency

Answer

None of these

Answer

Minimum frequency

Answer

Natural frequency

Question 10

10. Hook’s law is defined as

Answer

F and X are inverse proportional

Answer

None of these

Answer

F and X are direct proportional

Answer

F and X has no relation

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 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.

Question 12

12. 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 13

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

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

Answer

The force on the particle is maximum at the ends

Question 14

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

Question 15

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

Answer

2 x amplitude

Answer

Square of amplitude

Answer

4 x amplitude

Question 16

16. The damped oscillations are produced due to

Answer

System friction

Answer

Frictional support of the system

Answer

All of these

Answer

Air resistance

Question 17

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

Answer

First A then B

Answer

Remain the same

Question 18

18. 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 19

19. In energy conservation, when spring is stretched slowly so that acceleration is

Answer

None of these

Question 20

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

Question 21

21. A simple harmonic motion in which the

Answer

Acceleration produced is due to restoring force

Answer

Acceleration is directed towards the mean position

Answer

Acceleration is directly proportional to displacement

Answer

All of these

Question 22

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

Answer

Independent of x

Question 23

23. The vibrating bodies produce

Answer

All of these

Answer

Disturbance

Question 24

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

Answer

From means position to back to its means position

Answer

Means position to upper extreme position

Answer

All of these

Answer

From extreme position

Question 25

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

Answer

Restoring force is small

Answer

Quality factor is small

Answer

Applied periodic force is small

Answer

Damping force is small

Question 26

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

Answer

Half the mass

Answer

Double the mass

Answer

Quadruple the mass

Answer

Reduce the mass to one fourth

Question 27

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

Answer

Oscillation

Question 28

28. 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 29

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

Answer

Remains same

Answer

Becomes one half

Answer

Become on fourth

Answer

Becomes Double

Question 30

30. Frequency is the term used for

Answer

Number of vibration for second

Answer

Time to take one Vibration

Answer

Number of vibrations per minute

Answer

None of these

Question 31

31. 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 32

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

Answer

Becomes zero

Answer

Remains constant

Question 33

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

Answer

All of these

Answer

Fat molecules

Answer

Water molecules

Question 34

34. The damping depends upon

Answer

None of these

Question 35

35. 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 36

36. The body oscillates due to a

Answer

None of these

Answer

Restoring force

Answer

Applied force

Answer

Frictional force

Question 37

37. Simple harmonic motion is mathematically represented as

Answer

F α – x

Answer

A α – x

Answer

V α – x

Question 38

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

Answer

Remains constant

Answer

Becomes zero

Question 39

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

Answer

A hyperbola

Answer

A straight line

Answer

An ellipse

Question 40

40. The waveform of simple harmonic motion will be

Answer

None of these

Answer

Square wave

Answer

Saw tooth waveform

Question 41

41. S.I unit of frequency is

Answer

Vibration S¯²

Question 42

42. A simple pendulum is defined as

Answer

All of these

Answer

Light inextensible string

Answer

Small heavy mass

Answer

Friction less support

Question 43

43. Turning of a radio set is an example of

Answer

Electrical resonance

Answer

Musical resonance

Answer

Free vibration

Answer

Mechanical resonance

Question 44

44. Forced vibration are known as

Answer

Simple harmonic vibration

Answer

Free vibration

Answer

Driven harmonic vibration

Answer

Natural vibration

Question 45

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

Answer

All of these

Answer

Vp sin (90° - θ)

Answer

X₀ ω cos θ

Question 46

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

Answer

Extreme position

Answer

Between mean and extreme position

Answer

Mean position

Answer

None of these

Question 47

47. 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 48

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

Question 49

49. 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 50

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

Answer

V = √r² – x²

Answer

V = r² – x²

Answer

None of these

Answer

V = ω√r² – x²

Question 51

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

Question 52

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

Answer

Half the mass

Answer

Reduce the mass to one-fourth

Answer

Double the mass

Answer

Quadruple the mass

Question 53

53. 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 kinetic energy is maximum at the mean position

Answer

The potential energy is maximum at the mean position

Answer

The acceleration is minimum at the mean position

Question 54

54. The waves produced in microwave oven have a wavelength

Question 55

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

Question 56

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

Question 57

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

Answer

Circular Motion

Answer

Simple Harmonic Motion

Answer

Rectilinear Motion

Answer

Angular Motion

Question 58

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

Answer

Crossing mean position

Answer

Half way between them

Answer

Displacement is maximum

Question 59

59. Identify the exact statement among the following:

Answer

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

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

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°.

Question 60

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

Answer

All of these

Question 61

61. 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

Amplitude, angular frequency, acceleration

Answer

Angular frequency, Acceleration, force

Answer

Acceleration, force, total energy

Question 62

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

Answer

Force constant

Question 63

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

Answer

Wavelength of the various bodies

Answer

Amplitudes of the various bodies

Answer

None of these

Answer

Wavelength of the various bodies

Question 64

64. The kinetic energy is maximum when mass at equilibrium

Answer

P.E.max 1.2 K² X

Answer

P.E.max 1.2 KX₀²

Answer

P.E.max 1.2 KX²

Answer

None of these

Answer 171

Maximum in the extreme position

Answer 172

None of these

Answer 173

Zero in the mean position

Answer 174

None of these

Answer 175

Applied force

Answer 176

Driving source

Answer 177

Starting source

Answer 178

Extreme position

Answer 179

Mean position

Answer 180

Both a and b

Answer 181

Forced vibration

Answer 182

Powerful vibration

Answer 183

None of these

Answer 184

Free vibrations

Answer 185

Time period

Answer 186

Wavelength

Answer 187

Doppler’s effect

Answer 188

Time period will depend on the weight of the boy.

Answer 189

Time period will not change

Answer 190

Time period will increase

Answer 191

Time period will decrease

Answer 192

P.E. remains constant

Answer 193

K.E. remain constant

Answer 194

Total energy remain constant

Answer 195

Total momentum remain constant

Answer 196

-mg sin θ

Answer 197

-mg cos θ

Answer 198

Displacement only

Answer 199

Both displacement and direction of motion

Answer 200

Direction of motion only

Answer 201

Neither displacement nor direction of motion

Answer 202

Mean Position

Answer 203

Both a and b

Answer 204

Extreme Position

Answer 205

The length of the pendulum is decreased

Answer 206

The length of the pendulum is increased

Answer 207

The mass of the pendulum is increased

Answer 208

The mass of the pendulum is decreased

Answer 209

The mass of the pendulum is decreased

Answer 210

The mass of the pendulum is increased

Answer 211

The length of the pendulum is increased

Answer 212

The length of the pendulum is decreased

Answer 213

None of these

Answer 214

Tension is string

Answer 215

Drag force of air

Answer 216

X = X₀ sin ωt

Answer 217

None of these

Answer 218

X = X₀ cos ωt

Answer 219

X = X₀ cos (ωt + φ)

Answer 220

None of these

Answer 221

Total Energy

Answer 222

P.E. Energy

Answer 223

Angular Momentum

Answer 224

K.E. Energy

Answer 225

4π second

Answer 226

2π second

Answer 227

Wave motion

Answer 228

Periodic motion

Answer 229

Rotatory motion

Answer 230

Rectilinear motion

Answer 231

To and fro

Answer 232

Periodic motions

Answer 233

All of these

Answer 234

Vibratory motion

Answer 235

Square root of its length

Answer 236

Square of its length

Answer 237

Its length

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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