Physics Oscillations Online Mcqs Test

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Question 1

1. Frequency is the term used for

Answer

Number of vibration for second

Answer

Time to take one Vibration

Answer

Number of vibrations per minute

Answer

None of these

Question 2

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

Answer

All of these

Answer

X₀ ω cos θ

Answer

Vp sin (90° - θ)

Question 3

3. 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 4

4. Restoring force is defined as

Question 5

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

Answer

Nine times

Answer

Four times

Answer

Three times

Question 6

6. The waveform of simple harmonic motion will be

Answer

None of these

Answer

Square wave

Answer

Saw tooth waveform

Question 7

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

Answer

Ball bouncing between two rigid vertical walls

Answer

Earth spinning about its own axis

Answer

Particle moving in a circle with uniform speed.

Answer

Wave moving through a string fixed at both ends.

Question 8

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

Answer

Reduce the mass to one fourth

Answer

Half the mass

Answer

Double the mass

Answer

Quadruple the mass

Question 9

9. The frequency of second pendulum is

Answer

None of these

Question 10

10. 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 11

11. The speed of a particle executing SHM along a circular path is given by the relation

Answer

V = r² – x²

Answer

None of these

Answer

V = ω√r² – x²

Answer

V = √r² – x²

Question 12

12. 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

Periodic motion

Answer

Wave motion

Answer

Rotatory motion

Question 13

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

Answer

Amplitudes of the various bodies

Answer

Wavelength of the various bodies

Answer

Wavelength of the various bodies

Answer

None of these

Question 14

14. The energy of the oscillation comes from the

Answer

Starting source

Answer

None of these

Answer

Driving source

Answer

Applied force

Question 15

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

Question 16

16. 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 17

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

Answer

Both kinetic and potential energies are maximum

Answer

Kinetic energy is minimum, potential energy is maximum

Answer

Kinetic energy is maximum, potential energy is minimum

Answer

Both kinetic and potential energies are minimum

Question 18

18. 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 19

19. 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 20

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

Answer

Extreme position

Answer

Between mean and extreme position

Answer

Mean position

Answer

None of these

Question 21

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

Answer

Remains constant

Answer

Becomes zero

Question 22

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

Answer

2π second

Answer

4π second

Question 23

23. The damping depends upon

Answer

None of these

Question 24

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

Answer

Reduce the mass to one-fourth

Answer

Quadruple the mass

Answer

Double the mass

Answer

Half the mass

Question 25

25. 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

Potential energy

Answer

Phase difference between acceleration and displacement

Question 26

26. Phase of SHM describes

Answer

Both displacement and direction of motion

Answer

Displacement only

Answer

Neither displacement nor direction of motion

Answer

Direction of motion only

Question 27

27. 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 28

28. 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 length of the pendulum is decreased

Answer

The mass of the pendulum is decreased

Answer

The mass of the pendulum is increased

Question 29

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

Answer

Square of amplitude

Answer

2 x amplitude

Answer

4 x amplitude

Question 30

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

Answer

Powerful vibration

Answer

Free vibrations

Answer

Forced vibration

Answer

None of these

Question 31

31. The damped oscillations are produced due to

Answer

Frictional support of the system

Answer

System friction

Answer

Air resistance

Answer

All of these

Question 32

32. The waves produced in microwave oven have a wavelength

Question 33

33. Hook’s law is defined as

Answer

F and X are direct proportional

Answer

F and X are inverse proportional

Answer

F and X has no relation

Answer

None of these

Question 34

34. 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 35

35. The relation for the displacement in SHM is

Answer

X = X₀ cos (ωt + φ)

Answer

None of these

Answer

X = X₀ cos ωt

Answer

X = X₀ sin ωt

Question 36

36. Oscillatory motion is a type of motion which is

Answer

All of these

Answer

Periodic motions

Answer

Vibratory motion

Answer

To and fro

Question 37

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

Question 38

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

Answer

Quality factor is small

Answer

Damping force is small

Answer

Applied periodic force is small

Answer

Restoring force is small

Question 39

39. Identify the exact statement among the following:

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

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°.

Question 40

40. A simple pendulum is defined as

Answer

Small heavy mass

Answer

Friction less support

Answer

Light inextensible string

Answer

All of these

Question 41

41. 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 KX₀²

Answer

P.E. = ½ K²X²

Question 42

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

Question 43

43. 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 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

Question 44

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

Question 45

45. Forced vibration are known as

Answer

Natural vibration

Answer

Free vibration

Answer

Simple harmonic vibration

Answer

Driven harmonic vibration

Question 46

46. 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 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

Answer

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

Question 47

47. The restoring force applied on the pendulum

Answer

-mg sin θ

Answer

-mg cos θ

Question 48

48. 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 increase

Answer

Time period will not change

Answer

Time period will depend on the weight of the boy.

Question 49

49. 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

Answer

√k₁ k₂

Answer

(k₁ + k₂)/2

Answer

k₁ k₂/( k₁ + k₂)

Question 50

50. 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 51

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

Answer

Independent of x

Question 52

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

Question 53

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

Answer

Extreme Position

Answer

Both a and b

Answer

Mean Position

Question 54

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

Answer

Maximum as well minimum

Answer

Minimum only

Answer

Maximum only

Question 55

55. The vibrating bodies produce

Answer

All of these

Answer

Disturbance

Question 56

56. A simple harmonic motion in which the

Answer

Acceleration is directly proportional to displacement

Answer

Acceleration is directed towards the mean position

Answer

All of these

Answer

Acceleration produced is due to restoring force

Question 57

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

Answer

Means position to upper extreme position

Answer

All of these

Answer

From means position to back to its means position

Answer

From extreme position

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. The body oscillates due to a

Answer

Applied force

Answer

Restoring force

Answer

None of these

Answer

Frictional force

Question 60

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

Answer

Maximum in the extreme position

Answer

Zero in the mean position

Answer

None of these

Question 61

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

Question 62

62. 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 63

63. In simple harmonic motion

Answer

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

Answer

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

Answer

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

Answer

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

Question 64

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

Answer

Remains constant

Answer

Becomes zero

Answer 183

Angular Motion

Answer 184

Simple Harmonic Motion

Answer 185

Circular Motion

Answer 186

Rectilinear Motion

Answer 187

P.E.max 1.2 KX₀²

Answer 188

None of these

Answer 189

P.E.max 1.2 KX²

Answer 190

P.E.max 1.2 K² X

Answer 191

Vibration S¯²

Answer 192

V α – x

Answer 193

F α – x

Answer 194

A α – x

Answer 195

All of these

Answer 196

Oscillation

Answer 197

None of these

Answer 198

The potential energy is maximum at the mean position

Answer 199

The force on the particle is maximum at the ends

Answer 200

The acceleration is minimum at the mean position

Answer 201

The kinetic energy is maximum at the mean position

Answer 202

Extra ordinarily large

Answer 203

Minimum frequency

Answer 204

Natural frequency

Answer 205

None of these

Answer 206

Maximum frequency

Answer 207

Its length

Answer 208

Square of its length

Answer 209

Square root of its length

Answer 210

Wavelength

Answer 211

Doppler’s effect

Answer 212

Time period

Answer 213

Mechanical resonance

Answer 214

Free vibration

Answer 215

Musical resonance

Answer 216

Electrical resonance

Answer 217

Angular Momentum

Answer 218

K.E. Energy

Answer 219

P.E. Energy

Answer 220

Total Energy

Answer 221

Mean position

Answer 222

Both a and b

Answer 223

Extreme position

Answer 224

Total momentum remain constant

Answer 225

P.E. remains constant

Answer 226

Total energy remain constant

Answer 227

K.E. remain constant

Answer 228

Force constant

Answer 229

Remains constant

Answer 230

Becomes zero

Answer 231

An ellipse

Answer 232

A straight line

Answer 233

A hyperbola

Answer 234

The length of the pendulum is decreased

Answer 235

The mass of the pendulum is decreased

Answer 236

The length of the pendulum is increased

Answer 237

The mass of the pendulum is increased

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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