Physics Oscillations Online Mcqs Test

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Question 1

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

Answer

Mean Position

Answer

Both a and b

Answer

Extreme Position

Question 2

2. 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 3

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

Question 4

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

Answer

All of these

Question 5

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

Answer

Acceleration, force, total energy

Answer

Angular frequency, Acceleration, force

Answer

Total energy, amplitude, angular frequency

Answer

Amplitude, angular frequency, acceleration

Question 6

6. Simple harmonic motion is mathematically represented as

Answer

V α – x

Answer

F α – x

Answer

A α – x

Question 7

7. Turning of a radio set is an example of

Answer

Electrical resonance

Answer

Free vibration

Answer

Mechanical resonance

Answer

Musical resonance

Question 8

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

Question 9

9. 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 increased

Answer

The mass of the pendulum is decreased

Answer

The mass of the pendulum is increased

Answer

The length of the pendulum is decreased

Question 10

10. Forced vibration are known as

Answer

Simple harmonic vibration

Answer

Driven harmonic vibration

Answer

Free vibration

Answer

Natural vibration

Question 11

11. The restoring force applied on the pendulum

Answer

-mg sin θ

Answer

-mg cos θ

Question 12

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

Answer

Half the mass

Answer

Reduce the mass to one fourth

Answer

Double the mass

Answer

Quadruple the mass

Question 13

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

Answer

Nine times

Answer

Four times

Answer

Three times

Question 14

14. Oscillatory motion is a type of motion which is

Answer

Periodic motions

Answer

Vibratory motion

Answer

To and fro

Answer

All of these

Question 15

15. 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 16

16. Phase of SHM describes

Answer

Displacement only

Answer

Both displacement and direction of motion

Answer

Direction of motion only

Answer

Neither displacement nor direction of motion

Question 17

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

Answer

Becomes zero

Answer

Remains constant

Question 18

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

Answer

Double the mass

Answer

Reduce the mass to one-fourth

Answer

Quadruple the mass

Answer

Half the mass

Question 19

19. 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 depend on the weight of the boy.

Answer

Time period will increase

Answer

Time period will not change

Question 20

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

Answer

Becomes zero

Answer

Remains constant

Question 21

21. The frequency of second pendulum is

Answer

None of these

Question 22

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

Answer

P.E. = ½ K²X²

Answer

P.E. = ½ KX²

Answer

P.E. = ½ KX₀²

Answer

None of these

Question 23

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

Answer

Becomes one half

Answer

Remains same

Answer

Becomes Double

Answer

Become on fourth

Question 24

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

Answer

Water molecules

Answer

All of these

Answer

Fat molecules

Question 25

25. Hook’s law is defined as

Answer

None of these

Answer

F and X has no relation

Answer

F and X are direct proportional

Answer

F and X are inverse proportional

Question 26

26. Identify the exact statement among the following:

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 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

Question 27

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

Answer

Square of amplitude

Answer

4 x amplitude

Answer

2 x amplitude

Question 28

28. The waves produced in microwave oven have a wavelength

Question 29

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

Answer

X₀ ω cos θ

Answer

All of these

Answer

Vp sin (90° - θ)

Question 30

30. The energy of the oscillation comes from the

Answer

Applied force

Answer

None of these

Answer

Driving source

Answer

Starting source

Question 31

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

Answer

Remains constant

Answer

Becomes zero

Question 32

32. 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 decreased

Answer

The mass of the pendulum is decreased

Answer

The length of the pendulum is increased

Question 33

33. A simple harmonic motion in which the

Answer

All of these

Answer

Acceleration is directed towards the mean position

Answer

Acceleration is directly proportional to displacement

Answer

Acceleration produced is due to restoring force

Question 34

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

Answer

Mean position

Answer

Both a and b

Answer

Extreme position

Question 35

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

Answer

Zero in the mean position

Answer

Maximum in the extreme position

Answer

None of these

Question 36

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

Question 37

37. The damped oscillations are produced due to

Answer

All of these

Answer

System friction

Answer

Air resistance

Answer

Frictional support of the system

Question 38

38. 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

Rotatory motion

Answer

Rectilinear motion

Answer

Wave motion

Answer

Periodic motion

Question 39

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

Answer

Force constant

Question 40

40. 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 41

41. 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 42

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

Question 43

43. 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 44

44. 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 45

45. The vibrating bodies produce

Answer

Disturbance

Answer

All of these

Question 46

46. 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

Time period

Answer

Doppler’s effect

Answer

Wavelength

Question 47

47. 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 48

48. The relation for the displacement in SHM is

Answer

X = X₀ sin ωt

Answer

X = X₀ cos (ωt + φ)

Answer

X = X₀ cos ωt

Answer

None of these

Question 49

49. 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 50

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

Answer

Oscillation

Question 51

51. 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 52

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

Answer

Angular Motion

Answer

Rectilinear Motion

Answer

Circular Motion

Answer

Simple Harmonic Motion

Question 53

53. Restoring force is defined as

Question 54

54. The damping depends upon

Answer

None of these

Question 55

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

Answer

Independent of x

Question 56

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

Question 57

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

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

Answer

Both kinetic and potential energies are minimum

Question 58

58. The waveform of simple harmonic motion will be

Answer

None of these

Answer

Saw tooth waveform

Answer

Square wave

Question 59

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

Answer

Extra ordinarily large

Question 60

60. In simple harmonic motion

Answer

The velocity and displacement if the vibrating particle are in the same phase

Answer

The velocity and acceleration of 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.

Answer

The acceleration of the vibrating particle is ahead of displacement by a phase of π.

Question 61

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

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.

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 62

62. In vibratory motion which parameter remains constant?

Answer

P.E. Energy

Answer

Angular Momentum

Answer

K.E. Energy

Answer

Total Energy

Question 63

63. The body oscillates due to a

Answer

Applied force

Answer

None of these

Answer

Restoring force

Answer

Frictional force

Question 64

64. 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

Earth spinning about its own axis

Answer

Wave moving through a string fixed at both ends.

Answer 176

Square root of its length

Answer 177

Square of its length

Answer 178

Its length

Answer 179

Mean position

Answer 180

Between mean and extreme position

Answer 181

None of these

Answer 182

Extreme position

Answer 183

All of these

Answer 184

From extreme position

Answer 185

From means position to back to its means position

Answer 186

Means position to upper extreme position

Answer 187

First A then B

Answer 188

Remain the same

Answer 189

Potential energy

Answer 190

Phase difference between acceleration and displacement

Answer 191

Difference between kinetic energy and potential energy

Answer 192

The potential energy is maximum at the mean position

Answer 193

The force on the particle is maximum at the ends

Answer 194

The kinetic energy is maximum at the mean position

Answer 195

The acceleration is minimum at the mean position

Answer 196

On moving a body against gravitational force

Answer 197

One the rising of an air bubble in water

Answer 198

On stretching s spring

Answer 199

On compressing a spring

Answer 200

V = √r² – x²

Answer 201

V = ω√r² – x²

Answer 202

V = r² – x²

Answer 203

None of these

Answer 204

Maximum as well minimum

Answer 205

Minimum only

Answer 206

Maximum only

Answer 207

4π second

Answer 208

2π second

Answer 209

Friction less support

Answer 210

All of these

Answer 211

Light inextensible string

Answer 212

Small heavy mass

Answer 213

None of these

Answer 214

The potential energy is maximum at the mean position

Answer 215

The kinetic energy is maximum at the mean position

Answer 216

The acceleration is minimum at the mean position

Answer 217

The force on the particle is maximum at the ends

Answer 218

Minimum frequency

Answer 219

Natural frequency

Answer 220

Maximum frequency

Answer 221

None of these

Answer 222

Damping force is small

Answer 223

Applied periodic force is small

Answer 224

Quality factor is small

Answer 225

Restoring force is small

Answer 226

P.E. remains constant

Answer 227

K.E. remain constant

Answer 228

Total energy remain constant

Answer 229

Total momentum remain constant

Answer 230

Tension is string

Answer 231

None of these

Answer 232

Drag force of air

Answer 233

Vibration S¯²

Answer 234

Time to take one Vibration

Answer 235

Number of vibrations per minute

Answer 236

None of these

Answer 237

Number of vibration for second

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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