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

Answer

Oscillation

Question 3

3. 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

Wave motion

Answer

Rectilinear motion

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. 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

Wavelength

Answer

Doppler’s effect

Answer

Time period

Question 6

6. The body oscillates due to a

Answer

Frictional force

Answer

Applied force

Answer

None of these

Answer

Restoring force

Question 7

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

Answer

None of these

Answer

P.E. = ½ KX²

Answer

P.E. = ½ K²X²

Answer

P.E. = ½ KX₀²

Question 8

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

Answer

Reduce the mass to one-fourth

Answer

Quadruple the mass

Answer

Half the mass

Answer

Double the mass

Question 9

9. 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

Answer

k₁ k₂/( k₁ + k₂)

Answer

√k₁ k₂

Question 10

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

Answer

Maximum as well minimum

Answer

Maximum only

Answer

Minimum only

Question 11

11. 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 12

12. The waves produced in microwave oven have a wavelength

Question 13

13. The damping depends upon

Answer

None of these

Question 14

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

Answer

Earth spinning about its own axis

Answer

Particle moving in a circle with uniform speed.

Answer

Ball bouncing between two rigid vertical walls

Answer

Wave moving through a string fixed at both ends.

Question 15

15. Restoring force is defined as

Question 16

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

Question 17

17. 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 always ω²x₀ and its directed at right angles to its motion

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 18

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

Answer

Becomes zero

Answer

Remains constant

Question 19

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

Answer

Damping force is small

Answer

Restoring force is small

Answer

Quality factor is small

Answer

Applied periodic force is small

Question 20

20. In a simple harmonic motion (SHM), which of the following does not hold?

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

Answer

The potential energy is maximum at the mean position

Question 21

21. 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

Become on fourth

Answer

Remains same

Question 22

22. 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 23

23. 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 24

24. The kinetic energy is maximum when mass at equilibrium

Answer

P.E.max 1.2 KX²

Answer

P.E.max 1.2 KX₀²

Answer

None of these

Answer

P.E.max 1.2 K² X

Question 25

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

Question 26

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

Answer

All of these

Question 27

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

Answer

Extreme position

Answer

None of these

Answer

Mean position

Answer

Between mean and extreme position

Question 28

28. 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 29

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

Answer

4π second

Answer

2π second

Question 30

30. In vibratory motion which parameter remains constant?

Answer

P.E. Energy

Answer

Angular Momentum

Answer

K.E. Energy

Answer

Total Energy

Question 31

31. 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 32

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

Answer

Minimum frequency

Answer

Natural frequency

Answer

Maximum frequency

Answer

None of these

Question 33

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

Answer

Powerful vibration

Answer

None of these

Answer

Forced vibration

Answer

Free vibrations

Question 34

34. 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 35

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

Answer

Independent of x

Question 36

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

Question 37

37. In simple harmonic motion

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

Answer

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

Answer

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

Question 38

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

Answer

Force constant

Question 39

39. A simple harmonic motion in which the

Answer

Acceleration is directly proportional to displacement

Answer

All of these

Answer

Acceleration is directed towards the mean position

Answer

Acceleration produced is due to restoring force

Question 40

40. In vibratory motion

Answer

Total momentum remain constant

Answer

P.E. remains constant

Answer

Total energy remain constant

Answer

K.E. remain constant

Question 41

41. The vibrating bodies produce

Answer

All of these

Answer

Disturbance

Question 42

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

Answer

Tension is string

Answer

Drag force of air

Answer

None of these

Question 43

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

Question 44

44. Turning of a radio set is an example of

Answer

Mechanical resonance

Answer

Free vibration

Answer

Musical resonance

Answer

Electrical resonance

Question 45

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

Question 46

46. 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 47

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

Answer

Nine times

Answer

Four times

Answer

Three times

Question 48

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

Answer

Mean Position

Answer

Extreme Position

Answer

Both a and b

Question 49

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

Answer

V = √r² – x²

Answer

V = ω√r² – x²

Answer

None of these

Answer

V = r² – x²

Question 50

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

Answer

Extra ordinarily large

Question 51

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

Answer

Circular Motion

Answer

Simple Harmonic Motion

Answer

Rectilinear Motion

Answer

Angular Motion

Question 52

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

Answer

Becomes zero

Answer

Remains constant

Question 53

53. Simple harmonic motion is mathematically represented as

Answer

F α – x

Answer

V α – x

Answer

A α – x

Question 54

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

Question 55

55. The waveform of simple harmonic motion will be

Answer

Square wave

Answer

Saw tooth waveform

Answer

None of these

Question 56

56. The restoring force applied on the pendulum

Answer

-mg cos θ

Answer

-mg sin θ

Question 57

57. Natural frequency of simple pendulum depends upon

Answer

Its length

Answer

Square root of its length

Answer

Square of its length

Question 58

58. 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 59

59. 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

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The length of the pendulum is decreased

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The mass of the pendulum is increased

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The mass of the pendulum is decreased

Question 60

60. 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 61

61. The energy of the oscillation comes from the

Answer

Starting source

Answer

None of these

Answer

Applied force

Answer

Driving source

Question 62

62. Phase of SHM describes

Answer

Direction of motion only

Answer

Both displacement and direction of motion

Answer

Displacement only

Answer

Neither displacement nor direction of motion

Question 63

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

Question 64

64. A simple pendulum is defined as

Answer

Friction less support

Answer

Light inextensible string

Answer

Small heavy mass

Answer

All of these

Answer 172

Maximum in the extreme position

Answer 173

Zero in the mean position

Answer 174

None of these

Answer 175

The mass of the pendulum is increased

Answer 176

The length of the pendulum is increased

Answer 177

The length of the pendulum is decreased

Answer 178

The mass of the pendulum is decreased

Answer 179

None of these

Answer 180

On stretching s spring

Answer 181

On moving a body against gravitational force

Answer 182

One the rising of an air bubble in water

Answer 183

On compressing a spring

Answer 184

Remains constant

Answer 185

Becomes zero

Answer 186

Acceleration, force, total energy

Answer 187

Angular frequency, Acceleration, force

Answer 188

Amplitude, angular frequency, acceleration

Answer 189

Total energy, amplitude, angular frequency

Answer 190

None of these

Answer 191

Wavelength of the various bodies

Answer 192

Wavelength of the various bodies

Answer 193

Amplitudes of the various bodies

Answer 194

Vibration S¯²

Answer 195

Kinetic energy is maximum, potential energy is minimum

Answer 196

Both kinetic and potential energies are maximum

Answer 197

Both kinetic and potential energies are minimum

Answer 198

Kinetic energy is minimum, potential energy is maximum

Answer 199

Half way between them

Answer 200

Displacement is maximum

Answer 201

Crossing mean position

Answer 202

A hyperbola

Answer 203

A straight line

Answer 204

An ellipse

Answer 205

X₀ ω cos θ

Answer 206

All of these

Answer 207

Vp sin (90° - θ)

Answer 208

None of these

Answer 209

X = X₀ sin ωt

Answer 210

X = X₀ cos ωt

Answer 211

X = X₀ cos (ωt + φ)

Answer 212

Remain unaffected

Answer 213

Become infinite

Answer 214

Driven harmonic vibration

Answer 215

Natural vibration

Answer 216

Simple harmonic vibration

Answer 217

Free vibration

Answer 218

None of these

Answer 219

Extreme position

Answer 220

Both a and b

Answer 221

Mean position

Answer 222

Time period will not change

Answer 223

Time period will depend on the weight of the boy.

Answer 224

Time period will decrease

Answer 225

Time period will increase

Answer 226

Number of vibration for second

Answer 227

Number of vibrations per minute

Answer 228

None of these

Answer 229

Time to take one Vibration

Answer 230

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

Answer 231

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

Answer 232

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 233

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

Answer 234

All of these

Answer 235

Periodic motions

Answer 236

To and fro

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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