Physics Oscillations Online Mcqs Test

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Question 1

1. 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 2

2. The body oscillates due to a

Answer

Restoring force

Answer

Applied force

Answer

None of these

Answer

Frictional force

Question 3

3. 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 force on the particle is maximum at the ends

Answer

The potential energy is maximum at the mean position

Question 4

4. 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 5

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

Question 6

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

Question 7

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

Answer

Crossing mean position

Answer

Displacement is maximum

Answer

Half way between them

Question 8

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

Answer

Between mean and extreme position

Answer

Mean position

Answer

None of these

Answer

Extreme position

Question 9

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

Answer

4π second

Answer

2π second

Question 10

10. Restoring force is defined as

Question 11

11. 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 12

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

Answer

Mean position

Answer

Extreme position

Answer

Both a and b

Question 13

13. In vibratory motion which parameter remains constant?

Answer

Angular Momentum

Answer

P.E. Energy

Answer

Total Energy

Answer

K.E. Energy

Question 14

14. The frequency of second pendulum is

Answer

None of these

Question 15

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

Question 16

16. In vibratory motion

Answer

Total energy remain constant

Answer

K.E. remain constant

Answer

Total momentum remain constant

Answer

P.E. remains constant

Question 17

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

Answer

A straight line

Answer

An ellipse

Answer

A hyperbola

Question 18

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

Answer

Force constant

Question 19

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

Answer

Amplitude, angular frequency, acceleration

Answer

Total energy, amplitude, angular frequency

Answer

Acceleration, force, total energy

Answer

Angular frequency, Acceleration, force

Question 20

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

Answer

Independent of x

Question 21

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

Answer

Restoring force is small

Answer

Quality factor is small

Answer

Damping force is small

Answer

Applied periodic force is small

Question 22

22. Natural frequency of simple pendulum depends upon

Answer

Its length

Answer

Square root of its length

Answer

Square of its length

Question 23

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

Question 24

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

Answer

Three times

Answer

Four times

Answer

Nine times

Question 25

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

Answer

Quadruple the mass

Answer

Reduce the mass to one-fourth

Answer

Double the mass

Answer

Half the mass

Question 26

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

Answer

Extra ordinarily large

Question 27

27. Phase of SHM describes

Answer

Direction of motion only

Answer

Displacement only

Answer

Neither displacement nor direction of motion

Answer

Both displacement and direction of motion

Question 28

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

Answer

Tension is string

Answer

Drag force of air

Answer

None of these

Question 29

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

Answer

Becomes zero

Answer

Remains constant

Question 30

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

Answer

Maximum only

Answer

Minimum only

Answer

Maximum as well minimum

Question 31

31. The damped oscillations are produced due to

Answer

System friction

Answer

All of these

Answer

Air resistance

Answer

Frictional support of the system

Question 32

32. 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 33

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

Question 34

34. The energy of the oscillation comes from the

Answer

Starting source

Answer

Driving source

Answer

Applied force

Answer

None of these

Question 35

35. 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 length of the pendulum is increased

Answer

The mass of the pendulum is increased

Answer

The mass of the pendulum is decreased

Question 36

36. 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 37

37. 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 depend on the weight of the boy.

Answer

Time period will not change

Answer

Time period will decrease

Question 38

38. A simple harmonic motion in which the

Answer

Acceleration is directly proportional to displacement

Answer

Acceleration produced is due to restoring force

Answer

All of these

Answer

Acceleration is directed towards the mean position

Question 39

39. Oscillatory motion is a type of motion which is

Answer

To and fro

Answer

Periodic motions

Answer

All of these

Answer

Vibratory motion

Question 40

40. 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 41

41. In which case does the potential energy decreases?

Answer

On moving a body against gravitational force

Answer

On stretching s spring

Answer

One the rising of an air bubble in water

Answer

On compressing a spring

Question 42

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

Answer

All of these

Question 43

43. The relation for the displacement in SHM is

Answer

X = X₀ cos (ωt + φ)

Answer

None of these

Answer

X = X₀ sin ωt

Answer

X = X₀ cos ωt

Question 44

44. Identify the exact statement among the following:

Answer

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

Answer

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

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

Question 45

45. 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 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

Answer

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

Question 46

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

Answer

P.E. = ½ KX²

Answer

None of these

Answer

P.E. = ½ K²X²

Answer

P.E. = ½ KX₀²

Question 47

47. 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 48

48. 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 49

49. A simple pendulum is defined as

Answer

Light inextensible string

Answer

All of these

Answer

Small heavy mass

Answer

Friction less support

Question 50

50. 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)/2

Answer

√k₁ k₂

Question 51

51. 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 52

52. 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 53

53. The waves produced in microwave oven have a wavelength

Question 54

54. Forced vibration are known as

Answer

Natural vibration

Answer

Simple harmonic vibration

Answer

Driven harmonic vibration

Answer

Free vibration

Question 55

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

Answer

Wavelength of the various bodies

Answer

Amplitudes of the various bodies

Answer

Wavelength of the various bodies

Answer

None of these

Question 56

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

Answer

Remains constant

Answer

Becomes zero

Question 57

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

Answer

Simple Harmonic Motion

Answer

Rectilinear Motion

Answer

Circular Motion

Answer

Angular Motion

Question 58

58. The vibrating bodies produce

Answer

All of these

Answer

Disturbance

Question 59

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

Question 60

60. 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 61

61. Simple harmonic motion is mathematically represented as

Answer

V α – x

Answer

F α – x

Answer

A α – x

Question 62

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

Answer

Free vibrations

Answer

None of these

Answer

Forced vibration

Answer

Powerful vibration

Question 63

63. 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 64

64. 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 acceleration is minimum 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 178

Wave motion

Answer 179

Rotatory motion

Answer 180

Periodic motion

Answer 181

Rectilinear motion

Answer 182

Both a and b

Answer 183

Extreme Position

Answer 184

Mean Position

Answer 185

Becomes zero

Answer 186

Remains constant

Answer 187

None of these

Answer 188

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

Answer 189

The velocity and acceleration of the vibrating particle are in the same phase.

Answer 190

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

Answer 191

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

Answer 192

P.E.max 1.2 KX₀²

Answer 193

P.E.max 1.2 KX²

Answer 194

None of these

Answer 195

P.E.max 1.2 K² X

Answer 196

Vibration S¯²

Answer 197

From extreme position

Answer 198

Means position to upper extreme position

Answer 199

From means position to back to its means position

Answer 200

All of these

Answer 201

Time period

Answer 202

Doppler’s effect

Answer 203

Wavelength

Answer 204

Zero in the mean position

Answer 205

Maximum in the extreme position

Answer 206

None of these

Answer 207

-mg cos θ

Answer 208

-mg sin θ

Answer 209

None of these

Answer 210

Mechanical resonance

Answer 211

Free vibration

Answer 212

Electrical resonance

Answer 213

Musical resonance

Answer 214

Ball bouncing between two rigid vertical walls

Answer 215

Wave moving through a string fixed at both ends.

Answer 216

Earth spinning about its own axis

Answer 217

Particle moving in a circle with uniform speed.

Answer 218

Oscillation

Answer 219

Saw tooth waveform

Answer 220

Square wave

Answer 221

None of these

Answer 222

Kinetic energy is minimum, potential energy is maximum

Answer 223

Kinetic energy is maximum, potential energy is minimum

Answer 224

Both kinetic and potential energies are minimum

Answer 225

Both kinetic and potential energies are maximum

Answer 226

Becomes Double

Answer 227

Remains same

Answer 228

Becomes one half

Answer 229

Become on fourth

Answer 230

Reduce the mass to one fourth

Answer 231

Half the mass

Answer 232

Double the mass

Answer 233

Quadruple the mass

Answer 234

Number of vibrations per minute

Answer 235

None of these

Answer 236

Time to take one Vibration

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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