Physics Waves Online Mcqs Test

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Question 1

1. When two identical traveling waves are superimposed, the velocity of the resultant wave

Answer

Becomes zero

Answer

Remains unchanged

Question 2

2. For motion of a simple pendulum to be simple harmonic

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Independent of amplitude of motion

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Amplitude of motion will be every small

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Amplitude of motion will be very large

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None of these

Question 3

3. In stationary waves

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Energy is maximum at nodes and minimum at antidotes

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Energy is uniformly distributed

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Alternating maximum and minimum energy producing at nodes and antinodes

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Energy is minimum at nodes and maximum at antinodes

Question 4

4. In simple harmonic motion,

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

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

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

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

Question 5

5. What is frequency of radio waves transmitted by a station, if the wavelength of these waves is 300 m?

Question 6

6. The Doppler effect is produced if

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The detector is in motion

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The source is in motion

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Both the above

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None of these

Question 7

7. If the period of oscillation of mass m suspended from a spring is one second, then the period of 4 m will be:

Question 8

8. The length of a spring is ‘α’ when a force of 4N is applied on it. The length is β when 5N force is applied. Then the length of spring when 9N force is applied is

Answer

5α – 4β

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9 (β – α)

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5 β – 4 α

Question 9

9. The distance between node and antinode is

Question 10

10. 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

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Become infinite

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Remain unaffected

Question 11

11. Which one of the following statements is true for the speed v and the acceleration α of a particle executing simple harmonic motion?

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Value of α is zero, whatever may be the value of v

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When v is maximum, α is zero

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When v is zero, α is zero

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When v is maximum, α is maximum

Question 12

12. Velocity of sound in vacuum (in m/s) is

Question 13

13. Two springs of spring constants k₁ and k₂ are joined in series. The effective spring constant of the combination is given by

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√k₁k₂

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(k₁+k₂)/2

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k₁ k₂/( k₁+k₂)

Question 14

14. The velocity of sound in air not affected by changes in:

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Moisture contents in air

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The atmospheric pressure

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The composition of air

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Temperature of air

Question 15

15. Which phenomena can be applied to estimate the velocity of star with respect to earth?

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All of these

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Interference of waves

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Beats phenomena

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Doppler effect

Question 16

16. A sound source is moving towards stationary listener with 1/10th of the speed of sound. The ratio of apparent to real frequency is

Question 17

17. Silence zone takes place due to

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Constructive interference

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Destructive interference

Question 18

18. With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are

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Energy and mass

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Energy, momentum and mass

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Energy and linear momentum

Question 19

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

Question 20

20. Decibel is unit of

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Sound loudness

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x-ray radiation capacity

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Energy of radiation

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Intensity of light

Question 21

21. When a body moves in a circle, its projection performs what type of motion?

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Rectilinear Motion

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Angular Motion

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Circular Motion

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Simple Harmonic Motion

Question 22

22. Ultra Violet rays differ X rays in that ultra violet rays

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Cannot be polarized

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Have a lower frequency

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Do not affect photographic plate

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Cannot be diffracted

Question 23

23. A body with frequency f would complete one vibration in

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1/f seconds

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1/T seconds

Question 24

24. Fidelity refers to

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Reproduction of original image

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Reproduction of a CD from original copy

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Reproduction of original sound

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Reproduction of music

Question 25

25. The waves moving from a sitar to a listener in air are

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Transverse stationary

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Longitudinal stationary

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Transverse progressive

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Longitudinal progressive

Question 26

26. For production of beats the two sources must have

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Different frequencies, same amplitude and same phase

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Different frequencies and same amplitude

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Different frequencies and same phase

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Different frequencies

Question 27

27. A particle executes a simple harmonic motion of time period T. Find the time taken by the particle to go directly from its mean position to half the amplitude

Question 28

28. When the source of sound moves away form a stationary listener then _________ occurs.

Answer

No apparent change in frequency

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An apparent increase in frequency

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An apparent decrease in frequency

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An apparent decrease in wavelength

Question 29

29. If is possible to recognize a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice.

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Has a definite capacity

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Has a definite pitch

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Can penetrate the wall

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Has a definite quality

Question 30

30. Energy is not carried by

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Electromagnetic waves

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Longitudinal vibration

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Stationary waves

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Transverse progressive waves

Question 31

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

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Half the mass

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Double the mass

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Quadruple the mass

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Reduce the mass to one fourth

Question 32

32. A pendulum clock that keeps correct time on the Earth is taken to the Moon. It will run

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√6 times slower

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6 times faster

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√6 times faster

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At correct rate

Question 33

33. If two waves of length 50 cm and 51 cm produced 12 beats per second, the velocity of sound is

Question 34

34. Speed of sound in Water at 20°C is:

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1567 ms¯¹

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1214 ms¯¹

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1483 ms¯¹

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1343 ms¯¹

Question 35

35. It is possible to distinguish between transverse and longitudinal waves form the property of

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Refraction

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Interference

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Diffraction

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Polarization

Question 36

36. An oscillating mass-spring system generates

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Progressive waves

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Mechanical waves

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Periodic waves

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None of these

Question 37

37. Velocity of sound in vacuum is

Question 38

38. The velocity of sound in air depends upon

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Wavelength of sound

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Density and elasticity of gas

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Amplitude and frequency of sound

Question 39

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

Answer

Restoring force is small

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Quality factor is small

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Damping force is small

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Applied periodic force is small

Question 40

40. The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

Question 41

41. A wave is which the displacement of the wave travel perpendicular to the direction of propagation of waves is called

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Transverse wave

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Longitudinal waves

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Progressive wave

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None of these

Question 42

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

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A straight line

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An ellipse

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A hyperbola

Question 43

43. When a gas is heated at constant pressure, its volume is increased and its density

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Increased rapidly

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None of these

Question 44

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

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Zero in the mean position

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Maximum in the extreme position

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None of these

Question 45

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

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Becomes Zero

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Remains constant

Question 46

46. A spring-mass system oscillates with a frequency v, if it is taken in an elevator slowly accelerating upward, the frequency will

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Remains same

Answer

Become zero

Question 47

47. 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 not change

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Time period will depend on the weight of the boy.

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Time period will increase

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Time period will decrease

Question 48

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

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Crossing mean position

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Displacement is maximum

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Half way between them

Question 49

49. The distance between any two consecutive crests or troughs is called

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Wave length

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Phase difference

Question 50

50. The speed of sound in a medium depends on

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The elastic property as well as the inertia property

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Neither the elastic property nor the inertia property

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The inertia property but not on the elastic property

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The elastic property but not on the inertia property

Question 51

51. When temperature increases, the frequency of a tuning fork

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Remains same

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Increases or decreases depending on the material

Question 52

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

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Oscillation

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None of these

Question 53

53. The waves that require a material medium for their propagation are called

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Electromagnetic waves

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Mechanical waves

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Carrier waves

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Matter waves

Question 54

54. The length of the second’s pendulum on the surface of Earth is 1m. Its length on the surface of moon, where g is 1/6th the value of g on the surface of Earth, is:

Question 55

55. What sort of waves exhibit the Doppler effect?

Answer

Sound waves

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All of these

Answer

Water waves

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Light waves

Question 56

56. In stationary waves

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Alternating maximum and minimum energy producing at nodes and antinodes

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Energy is minimum at nodes and maximum at antinodes

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Energy is minimum at nodes and maximum at antidotes

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Energy is uniformly distributed

Question 57

57. The loudness and pitch of a sound note depends on

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Intensity and velocity

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Intensity and frequency

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Frequency and velocity

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Frequency and number of harmonic

Question 58

58. Maximum acceleration of an object in simple harmonic motion is 24 m/s² and maximum velocity is 16 m/sec. Then amplitude of SHM is

Question 59

59. Waves disturbances may also come in a concentrated bundles like stock waves from an airplane flying at:

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Supersonic speed

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Sonic speed

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Extra supersonic speed

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None of these

Question 60

60. Which one of the following instances are the waves plane-polarized?

Answer

Ultra-violet rays

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Visible light

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Infra-red radiation

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Gamma rays

Question 61

61. The velocity of sound is greatest in

Question 62

62. The response of the human ear to the loudness of sound is _________ in nature:

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Logarithmic

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Hyperbolic

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Exponential

Question 63

63. Which of the following changes at an antinode is a stationary wave?

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Density only

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Both pressure and density

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Pressure only

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Neither pressure nor density

Question 64

64. The gases have a

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None of these

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Large elastic modulus

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Zero elastic modulus

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Smaller elastic modules

Answer 177

Half that of the individual waves

Answer 178

Same as that of the individual waves

Answer 179

√2 that of the individual waves

Answer 180

Twice that of the individual waves

Answer 181

The energy is redistributed and the distribution changes with time

Answer 182

There is a gain of energy

Answer 183

There is a loss of energy

Answer 184

The energy is redistributed and the distribution remains constant with time

Answer 185

Independent of x

Answer 186

Reverberation

Answer 187

Time period

Answer 188

Oscillation Time

Answer 189

None of these

Answer 190

Reflection

Answer 191

Interference

Answer 192

Refraction

Answer 193

Polarization

Answer 194

Longitudinal

Answer 195

Transverse

Answer 196

Stationary

Answer 197

Electromagnetic

Answer 198

Beat phenomenon

Answer 199

Doppler effect

Answer 200

Interference

Answer 201

4π second

Answer 202

2π second

Answer 203

Frequency harmonic oscillator

Answer 204

Vibration harmonic oscillator

Answer 205

Driven harmonic oscillator

Answer 206

Reflection

Answer 207

Diffraction

Answer 208

Polarization

Answer 209

Refraction

Answer 210

None of these

Answer 211

Out of phase

Answer 212

Sometimes in phase

Answer 213

Total Energy

Answer 214

K.E. Energy

Answer 215

Angular Momentum

Answer 216

P.E. Energy

Answer 217

They do not have enough energy

Answer 218

They require material medium for propagation

Answer 219

They are stationary waves

Answer 220

They are transverse waves

Answer 221

Destructive interference

Answer 222

Polarization

Answer 223

Diffraction of sound waves

Answer 224

Constrictive and destructive interference

Answer 225

100 Nm¯¹

Answer 226

700 Nm¯¹

Answer 227

143 Nm¯¹

Answer 228

300 Nm¯¹

Answer 229

Become one fourth

Answer 230

Remains same

Answer 231

Becomes double

Answer 232

Becomes one half

Answer 233

√k₂/k₁

Answer 234

√k₁/k₂

Answer 235

5,000 to 11,000 Hz

Answer 236

2,000 to 4,000 Hz

Answer 237

3,000 to 6,000 Hz

Answer 238

4,000 to 8,000 Hz

Answer 239

Light wave only

Answer 240

Both sound and light waves

Answer 241

Neither sound nor light wave

Answer 242

Sound wave only

Answer 243

Wave mechanics

Answer 244

Wavelength

Answer 245

None of these

Total Questions:	94
Time Allowed:	40 Minutes
Total Marks:	94
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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