Physics Oscillations Online Mcqs Test

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Question 1

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

Answer

Quadruple the mass

Answer

Reduce the mass to one fourth

Answer

Half the mass

Answer

Double the mass

Question 2

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

Answer

Remains constant

Answer

Becomes zero

Question 3

3. 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 4

4. 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 5

5. The damping depends upon

Answer

None of these

Question 6

6. 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

Both kinetic and potential energies are minimum

Answer

Kinetic energy is maximum, potential energy is minimum

Question 7

7. Restoring force is defined as

Question 8

8. 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 9

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

Answer

Vp sin (90° - θ)

Answer

X₀ ω cos θ

Answer

All of these

Question 10

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

Answer

None of these

Answer

Free vibrations

Answer

Powerful vibration

Answer

Forced vibration

Question 11

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

Answer

Damping force is small

Answer

Applied periodic force is small

Answer

Quality factor is small

Answer

Restoring force is small

Question 12

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

Answer

All of these

Answer

From means position to back to its means position

Answer

From extreme position

Answer

Means position to upper extreme position

Question 13

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

Answer

Becomes zero

Answer

Remains constant

Question 14

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

Answer

Angular Motion

Answer

Rectilinear Motion

Answer

Circular Motion

Answer

Simple Harmonic Motion

Question 15

15. 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 16

16. A simple harmonic motion in which the

Answer

All of these

Answer

Acceleration produced is due to restoring force

Answer

Acceleration is directed towards the mean position

Answer

Acceleration is directly proportional to displacement

Question 17

17. The damped oscillations are produced due to

Answer

All of these

Answer

Frictional support of the system

Answer

Air resistance

Answer

System friction

Question 18

18. Natural frequency of simple pendulum depends upon

Answer

Square of its length

Answer

Square root of its length

Answer

Its length

Question 19

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

Question 20

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

Question 21

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

Answer

Three times

Answer

Nine times

Answer

Four times

Question 22

22. The energy of the oscillation comes from the

Answer

Starting source

Answer

None of these

Answer

Applied force

Answer

Driving source

Question 23

23. 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 increased

Answer

The length of the pendulum is decreased

Answer

The mass of the pendulum is decreased

Question 24

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

Answer

Mean position

Answer

Between mean and extreme position

Answer

None of these

Answer

Extreme position

Question 25

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

Answer

P.E. = ½ K²X²

Answer

P.E. = ½ KX²

Answer

None of these

Answer

P.E. = ½ KX₀²

Question 26

26. 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 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

Question 27

27. A simple pendulum is defined as

Answer

Light inextensible string

Answer

All of these

Answer

Friction less support

Answer

Small heavy mass

Question 28

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

Answer

Independent of x

Question 29

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

Question 30

30. 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

Potential energy

Answer

Phase difference between acceleration and displacement

Answer

Difference between kinetic energy and potential energy

Question 31

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

Answer

Oscillation

Question 32

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

Question 33

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

Question 34

34. 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/( k₁ + k₂)

Answer

k₁ + k₂

Answer

(k₁ + k₂)/2

Question 35

35. In vibratory motion which parameter remains constant?

Answer

Total Energy

Answer

Angular Momentum

Answer

K.E. Energy

Answer

P.E. Energy

Question 36

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

Answer

Quadruple the mass

Answer

Half the mass

Answer

Double the mass

Answer

Reduce the mass to one-fourth

Question 37

37. 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 38

38. The body oscillates due to a

Answer

Restoring force

Answer

Frictional force

Answer

Applied force

Answer

None of these

Question 39

39. In simple harmonic motion

Answer

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

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.

Question 40

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

Answer

4π second

Answer

2π second

Question 41

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

Answer

Become on fourth

Answer

Remains same

Answer

Becomes one half

Answer

Becomes Double

Question 42

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

Answer

Extra ordinarily large

Question 43

43. S.I unit of frequency is

Answer

Vibration S¯²

Question 44

44. 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 45

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

Answer

Both a and b

Answer

Extreme position

Answer

Mean position

Question 46

46. The waves produced in microwave oven have a wavelength

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

Remain unaffected

Answer

Become infinite

Question 48

48. In vibratory motion

Answer

Total energy remain constant

Answer

P.E. remains constant

Answer

Total momentum remain constant

Answer

K.E. remain constant

Question 49

49. 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 50

50. Oscillatory motion is a type of motion which is

Answer

All of these

Answer

To and fro

Answer

Periodic motions

Answer

Vibratory motion

Question 51

51. Turning of a radio set is an example of

Answer

Electrical resonance

Answer

Mechanical resonance

Answer

Free vibration

Answer

Musical resonance

Question 52

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

Question 53

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

Answer

2 x amplitude

Answer

Square of amplitude

Answer

4 x amplitude

Question 54

54. 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 55

55. Forced vibration are known as

Answer

Free vibration

Answer

Simple harmonic vibration

Answer

Driven harmonic vibration

Answer

Natural vibration

Question 56

56. Simple harmonic motion is mathematically represented as

Answer

F α – x

Answer

V α – x

Answer

A α – x

Question 57

57. The vibrating bodies produce

Answer

Disturbance

Answer

All of these

Question 58

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

Answer

Maximum only

Answer

Minimum only

Answer

Maximum as well minimum

Question 59

59. 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 60

60. The restoring force applied on the pendulum

Answer

-mg cos θ

Answer

-mg sin θ

Question 61

61. In which case does the potential energy decreases?

Answer

On compressing a spring

Answer

On stretching s spring

Answer

One the rising of an air bubble in water

Answer

On moving a body against gravitational force

Question 62

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

Answer

Force constant

Question 63

63. Identify the exact statement among the following:

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.

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

Question 64

64. Frequency is the term used for

Answer

Time to take one Vibration

Answer

Number of vibrations per minute

Answer

Number of vibration for second

Answer

None of these

Answer 173

None of these

Answer 174

X = X₀ cos ωt

Answer 175

X = X₀ cos (ωt + φ)

Answer 176

X = X₀ sin ωt

Answer 177

P.E.max 1.2 K² X

Answer 178

None of these

Answer 179

P.E.max 1.2 KX²

Answer 180

P.E.max 1.2 KX₀²

Answer 181

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

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

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

Answer 185

Amplitude, angular frequency, acceleration

Answer 186

Angular frequency, Acceleration, force

Answer 187

Acceleration, force, total energy

Answer 188

Total energy, amplitude, angular frequency

Answer 189

Fat molecules

Answer 190

Water molecules

Answer 191

All of these

Answer 192

Square wave

Answer 193

Saw tooth waveform

Answer 194

None of these

Answer 195

Becomes zero

Answer 196

Remains constant

Answer 197

Amplitudes of the various bodies

Answer 198

None of these

Answer 199

Wavelength of the various bodies

Answer 200

Wavelength of the various bodies

Answer 201

None of these

Answer 202

Wave moving through a string fixed at both ends.

Answer 203

Particle moving in a circle with uniform speed.

Answer 204

Ball bouncing between two rigid vertical walls

Answer 205

Earth spinning about its own axis

Answer 206

None of these

Answer 207

Maximum in the extreme position

Answer 208

Zero in the mean position

Answer 209

None of these

Answer 210

The length of the pendulum is increased

Answer 211

The mass of the pendulum is increased

Answer 212

The mass of the pendulum is decreased

Answer 213

The length of the pendulum is decreased

Answer 214

All of these

Answer 215

Time period will depend on the weight of the boy.

Answer 216

Time period will decrease

Answer 217

Time period will increase

Answer 218

Time period will not change

Answer 219

F and X are inverse proportional

Answer 220

F and X are direct proportional

Answer 221

None of these

Answer 222

F and X has no relation

Answer 223

Mean Position

Answer 224

Both a and b

Answer 225

Extreme Position

Answer 226

Rectilinear motion

Answer 227

Rotatory motion

Answer 228

Periodic motion

Answer 229

Wave motion

Answer 230

V = √r² – x²

Answer 231

V = ω√r² – x²

Answer 232

None of these

Answer 233

V = r² – x²

Answer 234

Direction of motion only

Answer 235

Neither displacement nor direction of motion

Answer 236

Displacement only

Answer 237

Both displacement and direction of 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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