Physics Oscillations Online Mcqs Test

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Question 1

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

Answer

Becomes Double

Answer

Becomes one half

Answer

Remains same

Answer

Become on fourth

Question 2

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

Answer

4π second

Answer

2π second

Question 3

3. 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

Question 4

4. 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 5

5. 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 6

6. The frequency of second pendulum is

Answer

None of these

Question 7

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

Answer

Applied periodic force is small

Answer

Restoring force is small

Answer

Damping force is small

Answer

Quality factor is small

Question 8

8. 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 9

9. Hook’s law is defined as

Answer

F and X are inverse proportional

Answer

F and X are direct proportional

Answer

None of these

Answer

F and X has no relation

Question 10

10. 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 11

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

Answer

Displacement is maximum

Answer

Half way between them

Answer

Crossing mean position

Question 12

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

Question 13

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

Question 14

14. The damping depends upon

Answer

None of these

Question 15

15. The relation for the displacement in SHM is

Answer

None of these

Answer

X = X₀ sin ωt

Answer

X = X₀ cos ωt

Answer

X = X₀ cos (ωt + φ)

Question 16

16. 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

Phase difference between acceleration and displacement

Answer

Potential energy

Question 17

17. 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 18

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

Answer

Independent of x

Question 19

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

Answer

None of these

Answer

Tension is string

Answer

Drag force of air

Question 20

20. Turning of a radio set is an example of

Answer

Musical resonance

Answer

Mechanical resonance

Answer

Electrical resonance

Answer

Free vibration

Question 21

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

Question 22

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

Question 23

23. In vibratory motion which parameter remains constant?

Answer

P.E. Energy

Answer

Total Energy

Answer

K.E. Energy

Answer

Angular Momentum

Question 24

24. Restoring force is defined as

Question 25

25. The energy of the oscillation comes from the

Answer

Applied force

Answer

Starting source

Answer

None of these

Answer

Driving source

Question 26

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

Answer

None of these

Question 27

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

Answer

Powerful vibration

Answer

Free vibrations

Answer

None of these

Answer

Forced vibration

Question 28

28. The vibrating bodies produce

Answer

All of these

Answer

Disturbance

Question 29

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

Answer

Remains constant

Answer

Becomes zero

Question 30

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

Answer

Nine times

Answer

Four times

Answer

Three times

Question 31

31. 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

Periodic motion

Answer

Rectilinear motion

Answer

Wave motion

Question 32

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

Answer

Amplitudes of the various bodies

Answer

None of these

Answer

Wavelength of the various bodies

Answer

Wavelength of the various bodies

Question 33

33. In which case does the potential energy decreases?

Answer

On moving a body against gravitational force

Answer

On compressing a spring

Answer

On stretching s spring

Answer

One the rising of an air bubble in water

Question 34

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

Answer

Maximum as well minimum

Answer

Maximum only

Answer

Minimum only

Question 35

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

Answer

Extreme Position

Answer

Mean Position

Answer

Both a and b

Question 36

36. 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 37

37. The waves produced in microwave oven have a wavelength

Question 38

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

Question 39

39. 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

Both kinetic and potential energies are minimum

Answer

Kinetic energy is minimum, potential energy is maximum

Question 40

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

Answer

Natural frequency

Answer

Maximum frequency

Answer

None of these

Answer

Minimum frequency

Question 41

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

Answer

Force constant

Question 42

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

Question 43

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

Answer

All of these

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

Question 46

46. 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 47

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

Answer

Extreme position

Answer

Mean position

Answer

None of these

Answer

Between mean and extreme position

Question 48

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

Answer

Extra ordinarily large

Question 49

49. 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 50

50. In vibratory motion

Answer

P.E. remains constant

Answer

K.E. remain constant

Answer

Total energy remain constant

Answer

Total momentum remain constant

Question 51

51. 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 52

52. 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 53

53. 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 54

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

Answer

All of these

Answer

Means position to upper extreme position

Answer

From extreme position

Answer

From means position to back to its means position

Question 55

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

Answer

A straight line

Answer

A hyperbola

Answer

An ellipse

Question 56

56. The damped oscillations are produced due to

Answer

System friction

Answer

Frictional support of the system

Answer

Air resistance

Answer

All of these

Question 57

57. 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 58

58. Phase of SHM describes

Answer

Neither displacement nor direction of motion

Answer

Direction of motion only

Answer

Displacement only

Answer

Both displacement and direction of motion

Question 59

59. The body oscillates due to a

Answer

Frictional force

Answer

Applied force

Answer

None of these

Answer

Restoring force

Question 60

60. Simple harmonic motion is mathematically represented as

Answer

A α – x

Answer

F α – x

Answer

V α – x

Question 61

61. 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 62

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

Answer

Quadruple the mass

Answer

Half the mass

Answer

Double the mass

Answer

Reduce the mass to one fourth

Question 63

63. A simple pendulum is defined as

Answer

Small heavy mass

Answer

All of these

Answer

Friction less support

Answer

Light inextensible string

Question 64

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

Answer

Becomes zero

Answer

Remains constant

Answer 172

Remains constant

Answer 173

Becomes zero

Answer 174

X₀ ω cos θ

Answer 175

All of these

Answer 176

Vp sin (90° - θ)

Answer 177

Vibration S¯²

Answer 178

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

Answer 179

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

Answer 180

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

Answer 181

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

Answer 182

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

Answer 183

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

Answer 184

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

Answer 185

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

Answer 186

Wave moving through a string fixed at both ends.

Answer 187

Ball bouncing between two rigid vertical walls

Answer 188

Earth spinning about its own axis

Answer 189

Particle moving in a circle with uniform speed.

Answer 190

None of these

Answer 191

V = r² – x²

Answer 192

V = √r² – x²

Answer 193

V = ω√r² – x²

Answer 194

Both a and b

Answer 195

Extreme position

Answer 196

Mean position

Answer 197

Driven harmonic vibration

Answer 198

Natural vibration

Answer 199

Simple harmonic vibration

Answer 200

Free vibration

Answer 201

Number of vibrations per minute

Answer 202

Time to take one Vibration

Answer 203

None of these

Answer 204

Number of vibration for second

Answer 205

Square of its length

Answer 206

Its length

Answer 207

Square root of its length

Answer 208

Rectilinear Motion

Answer 209

Simple Harmonic Motion

Answer 210

Circular Motion

Answer 211

Angular Motion

Answer 212

Oscillation

Answer 213

Saw tooth waveform

Answer 214

Square wave

Answer 215

None of these

Answer 216

-mg sin θ

Answer 217

-mg cos θ

Answer 218

P.E. = ½ KX²

Answer 219

None of these

Answer 220

P.E. = ½ K²X²

Answer 221

P.E. = ½ KX₀²

Answer 222

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 223

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

Answer 224

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

Answer 225

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

Answer 226

Vibratory motion

Answer 227

All of these

Answer 228

To and fro

Answer 229

Periodic motions

Answer 230

P.E.max 1.2 K² X

Answer 231

None of these

Answer 232

P.E.max 1.2 KX²

Answer 233

P.E.max 1.2 KX₀²

Answer 234

Acceleration is directly proportional to displacement

Answer 235

Acceleration produced is due to restoring force

Answer 236

Acceleration is directed towards the mean position

Answer 237

All 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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