Physics Oscillations Online Mcqs Test

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Question 1

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

Answer

None of these

Question 2

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

Question 3

3. In simple harmonic motion

Answer

The velocity and acceleration of 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 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 4

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

Question 5

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

Answer

Extra ordinarily large

Question 6

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

Answer

Becomes zero

Answer

Remains constant

Question 7

7. In vibratory motion which parameter remains constant?

Answer

K.E. Energy

Answer

P.E. Energy

Answer

Total Energy

Answer

Angular Momentum

Question 8

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

Answer

Both kinetic and potential energies are minimum

Answer

Both kinetic and potential energies are maximum

Answer

Kinetic energy is maximum, potential energy is minimum

Answer

Kinetic energy is minimum, potential energy is maximum

Question 9

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

Question 10

10. The frequency of second pendulum is

Answer

None of these

Question 11

11. Frequency is the term used for

Answer

Number of vibrations per minute

Answer

None of these

Answer

Number of vibration for second

Answer

Time to take one Vibration

Question 12

12. 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 13

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

Answer

All of these

Question 14

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

Answer

Both a and b

Answer

Mean Position

Answer

Extreme Position

Question 15

15. Turning of a radio set is an example of

Answer

Electrical resonance

Answer

Free vibration

Answer

Musical resonance

Answer

Mechanical resonance

Question 16

16. Restoring force is defined as

Question 17

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

Answer

Fat molecules

Answer

All of these

Answer

Water molecules

Question 18

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

Answer

None of these

Answer

Powerful vibration

Answer

Free vibrations

Answer

Forced vibration

Question 19

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

Answer

None of these

Answer

Drag force of air

Answer

Tension is string

Question 20

20. Hook’s law is defined as

Answer

F and X are inverse proportional

Answer

F and X are direct proportional

Answer

F and X has no relation

Answer

None of these

Question 21

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

Answer

P.E. = ½ KX₀²

Answer

P.E. = ½ K²X²

Answer

None of these

Answer

P.E. = ½ KX²

Question 22

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

Answer

2π second

Answer

4π second

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

Difference between kinetic energy and potential energy

Answer

Phase difference between acceleration and displacement

Question 24

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

Answer

Independent of x

Question 25

25. The restoring force applied on the pendulum

Answer

-mg cos θ

Answer

-mg sin θ

Question 26

26. Phase of SHM describes

Answer

Displacement only

Answer

Neither displacement nor direction of motion

Answer

Direction of motion only

Answer

Both displacement and direction of motion

Question 27

27. 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

Question 28

28. 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 29

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

Answer

Oscillation

Question 30

30. The energy of the oscillation comes from the

Answer

Starting source

Answer

Applied force

Answer

Driving source

Answer

None of these

Question 31

31. Simple harmonic motion is mathematically represented as

Answer

V α – x

Answer

F α – x

Answer

A α – x

Question 32

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

Question 33

33. Oscillatory motion is a type of motion which is

Answer

Vibratory motion

Answer

All of these

Answer

Periodic motions

Answer

To and fro

Question 34

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

Answer

Quadruple the mass

Answer

Half the mass

Answer

Reduce the mass to one fourth

Answer

Double the mass

Question 35

35. In which case does the potential energy decreases?

Answer

On stretching s spring

Answer

On moving a body against gravitational force

Answer

On compressing a spring

Answer

One the rising of an air bubble in water

Question 36

36. 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 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

Question 37

37. 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 mass of the pendulum is increased

Answer

The length of the pendulum is increased

Answer

The length of the pendulum is decreased

Question 38

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

Answer

V = ω√r² – x²

Answer

None of these

Answer

V = √r² – x²

Answer

V = r² – x²

Question 39

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

Answer

Remains constant

Answer

Becomes zero

Question 40

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

Answer

Applied periodic force is small

Answer

Damping force is small

Answer

Quality factor is small

Answer

Restoring force is small

Question 41

41. 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 42

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

Answer

Natural frequency

Answer

Minimum frequency

Answer

Maximum frequency

Answer

None of these

Question 43

43. 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 44

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

Answer

Becomes zero

Answer

Remains constant

Question 45

45. A simple harmonic motion in which the

Answer

Acceleration produced is due to restoring force

Answer

Acceleration is directly proportional to displacement

Answer

All of these

Answer

Acceleration is directed towards the mean position

Question 46

46. The waveform of simple harmonic motion will be

Answer

Saw tooth waveform

Answer

Square wave

Answer

None of these

Question 47

47. 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 decreased

Answer

The length of the pendulum is increased

Answer

The mass of the pendulum is increased

Question 48

48. 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 49

49. The damping depends upon

Answer

None of these

Question 50

50. 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 51

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

Answer

Wavelength of the various bodies

Answer

Wavelength of the various bodies

Answer

None of these

Answer

Amplitudes of the various bodies

Question 52

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

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

Answer

Ball bouncing between two rigid vertical walls

Question 53

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

Question 54

54. 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 55

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

Question 56

56. 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 acceleration is minimum at the mean position

Answer

The kinetic energy is maximum at the mean position

Answer

The force on the particle is maximum at the ends

Question 57

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

Question 58

58. The damped oscillations are produced due to

Answer

Air resistance

Answer

All of these

Answer

Frictional support of the system

Answer

System friction

Question 59

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

Answer

Rectilinear Motion

Answer

Simple Harmonic Motion

Answer

Angular Motion

Answer

Circular Motion

Question 60

60. 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 61

61. 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 62

62. 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 63

63. The vibrating bodies produce

Answer

All of these

Answer

Disturbance

Question 64

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

Answer

Vp sin (90° - θ)

Answer

All of these

Answer

X₀ ω cos θ

Answer 174

An ellipse

Answer 175

A straight line

Answer 176

A hyperbola

Answer 177

Wave motion

Answer 178

Periodic motion

Answer 179

Rotatory motion

Answer 180

Rectilinear motion

Answer 181

Maximum in the extreme position

Answer 182

None of these

Answer 183

Zero in the mean position

Answer 184

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

Answer 185

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

Answer 186

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

Answer 187

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

Answer 188

K.E. remain constant

Answer 189

Total momentum remain constant

Answer 190

P.E. remains constant

Answer 191

Total energy remain constant

Answer 192

Nine times

Answer 193

Four times

Answer 194

Three times

Answer 195

None of these

Answer 196

Between mean and extreme position

Answer 197

Mean position

Answer 198

Extreme position

Answer 199

Force constant

Answer 200

Vibration S¯²

Answer 201

Frictional force

Answer 202

None of these

Answer 203

Applied force

Answer 204

Restoring force

Answer 205

All of these

Answer 206

Small heavy mass

Answer 207

Light inextensible string

Answer 208

Friction less support

Answer 209

Maximum as well minimum

Answer 210

Minimum only

Answer 211

Maximum only

Answer 212

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 213

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

Answer 214

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

Answer 215

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

Answer 216

Driven harmonic vibration

Answer 217

Simple harmonic vibration

Answer 218

Free vibration

Answer 219

Natural vibration

Answer 220

Its length

Answer 221

Square root of its length

Answer 222

Square of its length

Answer 223

Total energy, amplitude, angular frequency

Answer 224

Acceleration, force, total energy

Answer 225

Angular frequency, Acceleration, force

Answer 226

Amplitude, angular frequency, acceleration

Answer 227

Double the mass

Answer 228

Quadruple the mass

Answer 229

Reduce the mass to one-fourth

Answer 230

Half the mass

Answer 231

X = X₀ cos (ωt + φ)

Answer 232

X = X₀ cos ωt

Answer 233

X = X₀ sin ωt

Answer 234

None of these

Answer 235

Extreme position

Answer 236

Mean position

Answer 237

Both a and b

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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