Physics Oscillations Online Mcqs Test

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Question 1

1. The damped oscillations are produced due to

Answer

All of these

Answer

System friction

Answer

Air resistance

Answer

Frictional support of the system

Question 2

2. 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 3

3. 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 4

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

Question 5

5. 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

Potential energy

Answer

Difference between kinetic energy and potential energy

Question 6

6. The vibrating bodies produce

Answer

All of these

Answer

Disturbance

Question 7

7. The restoring force applied on the pendulum

Answer

-mg cos θ

Answer

-mg sin θ

Question 8

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

Answer

Half the mass

Answer

Quadruple the mass

Answer

Reduce the mass to one-fourth

Answer

Double the mass

Question 9

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

Answer

Oscillation

Question 10

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

Answer

Becomes Double

Answer

Remains same

Answer

Become on fourth

Answer

Becomes one half

Question 11

11. Restoring force is defined as

Question 12

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

Answer

X₀ ω cos θ

Answer

Vp sin (90° - θ)

Answer

All of these

Question 13

13. 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 mass of the pendulum is increased

Answer

The length of the pendulum is increased

Question 14

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

Answer

Half way between them

Answer

Crossing mean position

Answer

Displacement is maximum

Question 15

15. Hook’s law is defined as

Answer

None of these

Answer

F and X are direct proportional

Answer

F and X are inverse proportional

Answer

F and X has no relation

Question 16

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

Answer

Reduce the mass to one fourth

Answer

Quadruple the mass

Answer

Half the mass

Answer

Double the mass

Question 17

17. 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 force on the particle is maximum at the ends

Answer

The kinetic energy is maximum at the mean position

Answer

The acceleration is minimum at the mean position

Question 18

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

Answer

Quality factor is small

Answer

Applied periodic force is small

Answer

Restoring force is small

Answer

Damping force is small

Question 19

19. 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

Periodic motion

Answer

Wave motion

Answer

Rotatory motion

Answer

Rectilinear motion

Question 20

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

Answer

4π second

Answer

2π second

Question 21

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

Question 22

22. 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)/2

Answer

k₁ k₂/( k₁ + k₂)

Answer

k₁ + k₂

Answer

√k₁ k₂

Question 23

23. 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 24

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

Question 25

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

Answer

Force constant

Question 26

26. 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

Wavelength

Answer

Doppler’s effect

Question 27

27. The relation for the displacement in SHM is

Answer

X = X₀ cos ωt

Answer

None of these

Answer

X = X₀ sin ωt

Answer

X = X₀ cos (ωt + φ)

Question 28

28. Forced vibration are known as

Answer

Free vibration

Answer

Simple harmonic vibration

Answer

Natural vibration

Answer

Driven harmonic vibration

Question 29

29. The waves produced in microwave oven have a wavelength

Question 30

30. Frequency is the term used for

Answer

Time to take one Vibration

Answer

None of these

Answer

Number of vibrations per minute

Answer

Number of vibration for second

Question 31

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

Answer

Wavelength of the various bodies

Answer

Amplitudes of the various bodies

Answer

None of these

Answer

Wavelength of the various bodies

Question 32

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

Answer

Powerful vibration

Answer

Forced vibration

Answer

None of these

Answer

Free vibrations

Question 33

33. 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 increased

Answer

The mass of the pendulum is increased

Answer

The length of the pendulum is decreased

Question 34

34. S.I unit of frequency is

Answer

Vibration S¯²

Question 35

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

Question 36

36. The body oscillates due to a

Answer

Frictional force

Answer

Restoring force

Answer

None of these

Answer

Applied force

Question 37

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

Answer

All of these

Answer

From extreme position

Answer

Means position to upper extreme position

Answer

From means position to back to its means position

Question 38

38. The damping depends upon

Answer

None of these

Question 39

39. 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 40

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

Question 41

41. Simple harmonic motion is mathematically represented as

Answer

F α – x

Answer

V α – x

Answer

A α – x

Question 42

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

Answer

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

Answer

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

Answer

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

Answer

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

Question 43

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

Answer

Remains constant

Answer

Becomes zero

Question 44

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

Question 45

45. In which case does the potential energy decreases?

Answer

On stretching s spring

Answer

One the rising of an air bubble in water

Answer

On moving a body against gravitational force

Answer

On compressing a spring

Question 46

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

Answer

Mean Position

Answer

Extreme Position

Answer

Both a and b

Question 47

47. 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 48

48. 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

Amplitude, angular frequency, acceleration

Answer

Total energy, amplitude, angular frequency

Question 49

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

Answer

4 x amplitude

Answer

2 x amplitude

Answer

Square of amplitude

Question 50

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

Answer

Becomes zero

Answer

Remains constant

Question 51

51. Phase of SHM describes

Answer

Neither displacement nor direction of motion

Answer

Both displacement and direction of motion

Answer

Direction of motion only

Answer

Displacement only

Question 52

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

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.

Question 53

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

Answer

Becomes zero

Answer

Remains constant

Question 54

54. 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 55

55. The waveform of simple harmonic motion will be

Answer

Saw tooth waveform

Answer

None of these

Answer

Square wave

Question 56

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

Answer

Independent of x

Question 57

57. 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 58

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

Answer

Tension is string

Answer

None of these

Answer

Drag force of air

Question 59

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

Answer

Three times

Answer

Nine times

Answer

Four times

Question 60

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

Answer

Wave moving through a string fixed at both ends.

Answer

Particle moving in a circle with uniform speed.

Answer

Ball bouncing between two rigid vertical walls

Answer

Earth spinning about its own axis

Question 61

61. In vibratory motion which parameter remains constant?

Answer

K.E. Energy

Answer

P.E. Energy

Answer

Total Energy

Answer

Angular Momentum

Question 62

62. 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 force on the particle is maximum at the ends

Answer

The acceleration is minimum at the mean position

Answer

The kinetic energy is maximum at the mean position

Question 63

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

Answer

Maximum frequency

Answer

Minimum frequency

Answer

Natural frequency

Answer

None of these

Question 64

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

Answer 178

None of these

Answer 179

P.E. remains constant

Answer 180

K.E. remain constant

Answer 181

Total energy remain constant

Answer 182

Total momentum remain constant

Answer 183

P.E.max 1.2 KX₀²

Answer 184

P.E.max 1.2 K² X

Answer 185

None of these

Answer 186

P.E.max 1.2 KX²

Answer 187

Time period will not change

Answer 188

Time period will increase

Answer 189

Time period will decrease

Answer 190

Time period will depend on the weight of the boy.

Answer 191

Free vibration

Answer 192

Musical resonance

Answer 193

Mechanical resonance

Answer 194

Electrical resonance

Answer 195

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

Answer 196

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

Answer 197

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

Answer 198

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

Answer 199

All of these

Answer 200

Light inextensible string

Answer 201

Small heavy mass

Answer 202

All of these

Answer 203

Friction less support

Answer 204

Extra ordinarily large

Answer 205

Acceleration produced is due to restoring force

Answer 206

All of these

Answer 207

Acceleration is directly proportional to displacement

Answer 208

Acceleration is directed towards the mean position

Answer 209

None of these

Answer 210

Square of its length

Answer 211

Square root of its length

Answer 212

Its length

Answer 213

Mean position

Answer 214

Extreme position

Answer 215

Between mean and extreme position

Answer 216

None of these

Answer 217

Simple Harmonic Motion

Answer 218

Angular Motion

Answer 219

Rectilinear Motion

Answer 220

Circular Motion

Answer 221

Maximum only

Answer 222

Minimum only

Answer 223

Maximum as well minimum

Answer 224

None of these

Answer 225

Starting source

Answer 226

Driving source

Answer 227

Applied force

Answer 228

Zero in the mean position

Answer 229

Maximum in the extreme position

Answer 230

None of these

Answer 231

Periodic motions

Answer 232

Vibratory motion

Answer 233

All of these

Answer 234

To and fro

Answer 235

Mean position

Answer 236

Both a and b

Answer 237

Extreme position

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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