Physics Oscillations Online Mcqs Test

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Question 1

1. 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 2

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

Question 3

3. Forced vibration are known as

Answer

Natural vibration

Answer

Free vibration

Answer

Simple harmonic vibration

Answer

Driven harmonic vibration

Question 4

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

Question 5

5. Simple harmonic motion is mathematically represented as

Answer

A α – x

Answer

V α – x

Answer

F α – x

Question 6

6. 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 7

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

Answer

Four times

Answer

Nine times

Answer

Three times

Question 8

8. S.I unit of frequency is

Answer

Vibration S¯²

Question 9

9. 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 10

10. A simple harmonic motion in which the

Answer

All of these

Answer

Acceleration is directed towards the mean position

Answer

Acceleration produced is due to restoring force

Answer

Acceleration is directly proportional to displacement

Question 11

11. 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 not change

Answer

Time period will increase

Answer

Time period will depend on the weight of the boy.

Answer

Time period will decrease

Question 12

12. 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 13

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

Answer

The kinetic energy is maximum at the mean position

Answer

The force on the particle is maximum at the ends

Answer

The acceleration is minimum at the mean position

Answer

The potential energy is maximum at the mean position

Question 14

14. The damping depends upon

Answer

None of these

Question 15

15. The waveform of simple harmonic motion will be

Answer

None of these

Answer

Square wave

Answer

Saw tooth waveform

Question 16

16. Restoring force is defined as

Question 17

17. Frequency is the term used for

Answer

Time to take one Vibration

Answer

None of these

Answer

Number of vibration for second

Answer

Number of vibrations per minute

Question 18

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

Question 19

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

Answer

Becomes zero

Answer

Remains constant

Question 20

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

Answer

All of these

Answer

Water molecules

Answer

Fat molecules

Question 21

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

Question 22

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

Question 23

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

Answer

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

Answer

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

Question 24

24. In simple harmonic motion

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.

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.

Question 25

25. Turning of a radio set is an example of

Answer

Musical resonance

Answer

Electrical resonance

Answer

Free vibration

Answer

Mechanical resonance

Question 26

26. The damped oscillations are produced due to

Answer

Frictional support of the system

Answer

Air resistance

Answer

All of these

Answer

System friction

Question 27

27. In vibratory motion which parameter remains constant?

Answer

K.E. Energy

Answer

P.E. Energy

Answer

Total Energy

Answer

Angular Momentum

Question 28

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

Answer

Quadruple the mass

Answer

Double the mass

Answer

Half the mass

Answer

Reduce the mass to one-fourth

Question 29

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

Answer

None of these

Answer

Extreme position

Answer

Mean position

Answer

Between mean and extreme position

Question 30

30. 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 31

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

Answer

Circular Motion

Answer

Angular Motion

Answer

Rectilinear Motion

Answer

Simple Harmonic Motion

Question 32

32. 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 33

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

Answer

Maximum frequency

Answer

Natural frequency

Answer

None of these

Answer

Minimum frequency

Question 34

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

Answer

Both a and b

Answer

Extreme Position

Answer

Mean Position

Question 35

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

Answer

Oscillation

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 kinetic energy is maximum when mass at equilibrium

Answer

None of these

Answer

P.E.max 1.2 KX²

Answer

P.E.max 1.2 K² X

Answer

P.E.max 1.2 KX₀²

Question 38

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

Question 39

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

Answer

Maximum only

Answer

Maximum as well minimum

Answer

Minimum only

Question 40

40. A simple pendulum is defined as

Answer

Light inextensible string

Answer

Friction less support

Answer

Small heavy mass

Answer

All of these

Question 41

41. In vibratory motion

Answer

Total momentum remain constant

Answer

Total energy remain constant

Answer

P.E. remains constant

Answer

K.E. remain constant

Question 42

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

Answer

Remains constant

Answer

Becomes zero

Question 43

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

Question 44

44. 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 45

45. The energy of the oscillation comes from the

Answer

None of these

Answer

Starting source

Answer

Driving source

Answer

Applied force

Question 46

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

Answer

None of these

Question 47

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

Answer

Damping force is small

Answer

Applied periodic force is small

Answer

Quality factor is small

Answer

Restoring force is small

Question 48

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

Answer

2 x amplitude

Answer

4 x amplitude

Answer

Square of amplitude

Question 49

49. 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 50

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

Answer

P.E. = ½ K²X²

Answer

None of these

Answer

P.E. = ½ KX₀²

Answer

P.E. = ½ KX²

Question 51

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

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

Answer

The acceleration is minimum at the mean position

Question 52

52. 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

Phase difference between acceleration and displacement

Answer

Difference between kinetic energy and potential energy

Answer

Potential energy

Question 53

53. 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 decreased

Answer

The mass of the pendulum is increased

Answer

The length of the pendulum is increased

Answer

The mass of the pendulum is decreased

Question 54

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

Answer

Wavelength of the various bodies

Answer

None of these

Answer

Wavelength of the various bodies

Answer

Amplitudes of the various bodies

Question 55

55. Oscillatory motion is a type of motion which is

Answer

To and fro

Answer

All of these

Answer

Periodic motions

Answer

Vibratory motion

Question 56

56. 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 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 acceleration is proportional to, and in the opposite direction to, the displacement

Question 57

57. The vibrating bodies produce

Answer

Disturbance

Answer

All of these

Question 58

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

Answer

Force constant

Question 59

59. 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

Rectilinear motion

Answer

Wave motion

Answer

Periodic motion

Answer

Rotatory motion

Question 60

60. The relation for the displacement in SHM is

Answer

None of these

Answer

X = X₀ cos (ωt + φ)

Answer

X = X₀ cos ωt

Answer

X = X₀ sin ωt

Question 61

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

Answer

Both kinetic and potential energies are minimum

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

Question 62

62. 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 length of the pendulum is decreased

Answer

The mass of the pendulum is increased

Question 63

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

Answer

None of these

Answer

Zero in the mean position

Answer

Maximum in the extreme position

Question 64

64. The waves produced in microwave oven have a wavelength

Answer 176

Quadruple the mass

Answer 177

Half the mass

Answer 178

Double the mass

Answer 179

Reduce the mass to one fourth

Answer 180

Restoring force

Answer 181

Frictional force

Answer 182

None of these

Answer 183

Applied force

Answer 184

-mg cos θ

Answer 185

-mg sin θ

Answer 186

All of these

Answer 187

Its length

Answer 188

Square of its length

Answer 189

Square root of its length

Answer 190

Mean position

Answer 191

Extreme position

Answer 192

Both a and b

Answer 193

Extra ordinarily large

Answer 194

Displacement is maximum

Answer 195

Crossing mean position

Answer 196

Half way between them

Answer 197

One the rising of an air bubble in water

Answer 198

On compressing a spring

Answer 199

On stretching s spring

Answer 200

On moving a body against gravitational force

Answer 201

Amplitude, angular frequency, acceleration

Answer 202

Angular frequency, Acceleration, force

Answer 203

Total energy, amplitude, angular frequency

Answer 204

Acceleration, force, total energy

Answer 205

Wavelength

Answer 206

Time period

Answer 207

Doppler’s effect

Answer 208

Independent of x

Answer 209

Displacement only

Answer 210

Direction of motion only

Answer 211

Neither displacement nor direction of motion

Answer 212

Both displacement and direction of motion

Answer 213

Remains constant

Answer 214

Becomes zero

Answer 215

Ball bouncing between two rigid vertical walls

Answer 216

Particle moving in a circle with uniform speed.

Answer 217

Earth spinning about its own axis

Answer 218

Wave moving through a string fixed at both ends.

Answer 219

An ellipse

Answer 220

A hyperbola

Answer 221

A straight line

Answer 222

None of these

Answer 223

Remain unaffected

Answer 224

Become infinite

Answer 225

2π second

Answer 226

4π second

Answer 227

All of these

Answer 228

From means position to back to its means position

Answer 229

From extreme position

Answer 230

Means position to upper extreme position

Answer 231

Forced vibration

Answer 232

Powerful vibration

Answer 233

Free vibrations

Answer 234

None of these

Answer 235

Tension is string

Answer 236

Drag force of air

Answer 237

None of these

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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