Physics Oscillations Online Mcqs Test

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Question 1

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

Answer

All of these

Question 2

2. The damped oscillations are produced due to

Answer

Air resistance

Answer

Frictional support of the system

Answer

All of these

Answer

System friction

Question 3

3. 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/( k₁ + k₂)

Answer

(k₁ + k₂)/2

Question 4

4. The restoring force applied on the pendulum

Answer

-mg cos θ

Answer

-mg sin θ

Question 5

5. In simple harmonic motion

Answer

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

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 displacement if the vibrating particle are in the same phase

Question 6

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

Answer

Extra ordinarily large

Question 7

7. The waveform of simple harmonic motion will be

Answer

None of these

Answer

Saw tooth waveform

Answer

Square wave

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 mass of the pendulum is increased

Answer

The length of the pendulum is increased

Answer

The mass of the pendulum is decreased

Answer

The length of the pendulum is decreased

Question 9

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

Answer

All of these

Answer

Means position to upper extreme position

Answer

From means position to back to its means position

Answer

From extreme position

Question 10

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

Answer

Independent of x

Question 11

11. 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 12

12. The kinetic energy is maximum when mass at equilibrium

Answer

P.E.max 1.2 KX₀²

Answer

None of these

Answer

P.E.max 1.2 KX²

Answer

P.E.max 1.2 K² X

Question 13

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

Answer

Drag force of air

Answer

Tension is string

Answer

None of these

Question 14

14. 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 decreased

Answer

The length of the pendulum is increased

Question 15

15. The relation for the displacement in SHM is

Answer

X = X₀ cos (ωt + φ)

Answer

X = X₀ cos ωt

Answer

X = X₀ sin ωt

Answer

None of these

Question 16

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

Answer

None of these

Answer

V = ω√r² – x²

Answer

V = r² – x²

Answer

V = √r² – x²

Question 17

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

Answer

4π second

Answer

2π second

Question 18

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

Question 19

19. The waves produced in microwave oven have a wavelength

Question 20

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

Answer

None of these

Answer

Natural frequency

Answer

Minimum frequency

Answer

Maximum frequency

Question 21

21. A simple harmonic motion in which the

Answer

Acceleration produced is due to restoring force

Answer

Acceleration is directed towards the mean position

Answer

Acceleration is directly proportional to displacement

Answer

All of these

Question 22

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

Answer

None of these

Answer

Powerful vibration

Answer

Forced vibration

Answer

Free vibrations

Question 23

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

Answer

An ellipse

Answer

A hyperbola

Answer

A straight line

Question 24

24. Frequency is the term used for

Answer

Number of vibration for second

Answer

Number of vibrations per minute

Answer

None of these

Answer

Time to take one Vibration

Question 25

25. 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 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

Question 26

26. The damping depends upon

Answer

None of these

Question 27

27. 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 28

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

Answer

Oscillation

Question 29

29. 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 30

30. 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 depend on the weight of the boy.

Answer

Time period will decrease

Answer

Time period will increase

Answer

Time period will not change

Question 31

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

Question 32

32. 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 33

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

Answer

All of these

Answer

Fat molecules

Answer

Water molecules

Question 34

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

Answer

Half way between them

Answer

Displacement is maximum

Answer

Crossing mean position

Question 35

35. Forced vibration are known as

Answer

Free vibration

Answer

Driven harmonic vibration

Answer

Simple harmonic vibration

Answer

Natural vibration

Question 36

36. In vibratory motion which parameter remains constant?

Answer

P.E. Energy

Answer

Total Energy

Answer

K.E. Energy

Answer

Angular Momentum

Question 37

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

Answer

Double the mass

Answer

Quadruple the mass

Answer

Half the mass

Answer

Reduce the mass to one-fourth

Question 38

38. Restoring force is defined as

Question 39

39. 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 40

40. 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 41

41. In which case does the potential energy decreases?

Answer

On stretching s spring

Answer

On compressing a spring

Answer

One the rising of an air bubble in water

Answer

On moving a body against gravitational force

Question 42

42. The body oscillates due to a

Answer

Restoring force

Answer

None of these

Answer

Applied force

Answer

Frictional force

Question 43

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

Answer

Become on fourth

Answer

Becomes Double

Answer

Remains same

Answer

Becomes one half

Question 44

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

Answer

Force constant

Question 45

45. 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 46

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

Question 47

47. 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 48

48. The vibrating bodies produce

Answer

All of these

Answer

Disturbance

Question 49

49. Hook’s law is defined as

Answer

F and X are direct proportional

Answer

None of these

Answer

F and X are inverse proportional

Answer

F and X has no relation

Question 50

50. Natural frequency of simple pendulum depends upon

Answer

Its length

Answer

Square root of its length

Answer

Square of its length

Question 51

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

Answer

All of these

Answer

Vp sin (90° - θ)

Answer

X₀ ω cos θ

Question 52

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

Question 53

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

Answer

Reduce the mass to one fourth

Answer

Half the mass

Answer

Quadruple the mass

Answer

Double the mass

Question 54

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

Answer

Maximum only

Answer

Maximum as well minimum

Answer

Minimum only

Question 55

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

Answer

Wave moving through a string fixed at both ends.

Answer

Earth spinning about its own axis

Answer

Ball bouncing between two rigid vertical walls

Answer

Particle moving in a circle with uniform speed.

Question 56

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

Question 57

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

Answer

Mean Position

Answer

Extreme Position

Answer

Both a and b

Question 58

58. A simple pendulum is defined as

Answer

Small heavy mass

Answer

Light inextensible string

Answer

All of these

Answer

Friction less support

Question 59

59. Turning of a radio set is an example of

Answer

Free vibration

Answer

Mechanical resonance

Answer

Musical resonance

Answer

Electrical resonance

Question 60

60. In vibratory motion

Answer

Total energy remain constant

Answer

K.E. remain constant

Answer

P.E. remains constant

Answer

Total momentum remain constant

Question 61

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

Answer

Rectilinear Motion

Answer

Circular Motion

Answer

Angular Motion

Answer

Simple Harmonic Motion

Question 62

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

Answer

Between mean and extreme position

Answer

None of these

Answer

Extreme position

Answer

Mean position

Question 63

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

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 maximum

Answer

Both kinetic and potential energies are minimum

Question 64

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

Answer 180

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

Answer 181

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

Answer 182

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

Answer 183

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

Answer 184

Vibration S¯²

Answer 185

None of these

Answer 186

Remains constant

Answer 187

Becomes zero

Answer 188

None of these

Answer 189

Wavelength of the various bodies

Answer 190

Wavelength of the various bodies

Answer 191

Amplitudes of the various bodies

Answer 192

None of these

Answer 193

Becomes zero

Answer 194

Remains constant

Answer 195

Rectilinear motion

Answer 196

Wave motion

Answer 197

Rotatory motion

Answer 198

Periodic motion

Answer 199

Displacement only

Answer 200

Neither displacement nor direction of motion

Answer 201

Direction of motion only

Answer 202

Both displacement and direction of motion

Answer 203

Mean position

Answer 204

Extreme position

Answer 205

Both a and b

Answer 206

Amplitude, angular frequency, acceleration

Answer 207

Total energy, amplitude, angular frequency

Answer 208

Acceleration, force, total energy

Answer 209

Angular frequency, Acceleration, force

Answer 210

None of these

Answer 211

Maximum in the extreme position

Answer 212

Zero in the mean position

Answer 213

Three times

Answer 214

Four times

Answer 215

Nine times

Answer 216

Remains constant

Answer 217

Becomes zero

Answer 218

Driving source

Answer 219

Starting source

Answer 220

Applied force

Answer 221

None of these

Answer 222

A α – x

Answer 223

V α – x

Answer 224

F α – x

Answer 225

Become infinite

Answer 226

Remain unaffected

Answer 227

P.E. = ½ KX²

Answer 228

P.E. = ½ K²X²

Answer 229

None of these

Answer 230

P.E. = ½ KX₀²

Answer 231

Square of amplitude

Answer 232

4 x amplitude

Answer 233

2 x amplitude

Answer 234

To and fro

Answer 235

All of these

Answer 236

Periodic motions

Answer 237

Vibratory motion

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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