Physics Waves Online Mcqs Test

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Question 1

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

Answer

Hyperbolic

Answer

Exponential

Answer

Logarithmic

Question 2

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

Answer

Refraction

Answer

Diffraction

Answer

Interference

Answer

Polarization

Question 3

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

Answer

Becomes one half

Answer

Remains same

Answer

Becomes double

Answer

Become one fourth

Question 4

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

Answer

None of these

Answer

Maximum in the extreme position

Answer

Zero in the mean position

Question 5

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

Answer

Longitudinal stationary

Answer

Transverse progressive

Answer

Transverse stationary

Answer

Longitudinal progressive

Question 6

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

Answer

None of these

Answer

Progressive wave

Answer

Longitudinal waves

Answer

Transverse wave

Question 7

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

Answer

Remains constant

Answer

Becomes Zero

Question 8

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

Answer

Intensity and velocity

Answer

Frequency and velocity

Answer

Frequency and number of harmonic

Answer

Intensity and frequency

Question 9

9. 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.

Answer

Has a definite pitch

Answer

Has a definite capacity

Answer

Can penetrate the wall

Answer

Has a definite quality

Question 10

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

Answer

Phase difference

Answer

Wave length

Question 11

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

Answer

4π second

Answer

2π second

Question 12

12. In stationary waves

Answer

Energy is minimum at nodes and maximum at antinodes

Answer

Energy is uniformly distributed

Answer

Alternating maximum and minimum energy producing at nodes and antinodes

Answer

Energy is minimum at nodes and maximum at antidotes

Question 13

13. 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 14

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

Answer

Interference of waves

Answer

Beats phenomena

Answer

Doppler effect

Answer

All of these

Question 15

15. The points at which the distance separated by λ, 2λ, 3λ, ........ are

Answer

Sometimes in phase

Answer

None of these

Answer

Out of phase

Question 16

16. A mass m attached to a spring oscillate every 2 sec. If the mass increases by 2 kg, then time period increases by 1 sec. The initial mass of the body is:

Question 17

17. Which one is not produce by sound waves in air?

Answer

Diffraction

Answer

Polarization

Answer

Reflection

Answer

Refraction

Question 18

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

Answer

Quadruple the mass

Answer

Reduce the mass to one fourth

Answer

Double the mass

Answer

Half the mass

Question 19

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

Answer

A hyperbola

Answer

A straight line

Answer

An ellipse

Question 20

20. Sound waves do not travel in vacuum because

Answer

They are stationary waves

Answer

They require material medium for propagation

Answer

They are transverse waves

Answer

They do not have enough energy

Question 21

21. Beats are the results of

Answer

Destructive interference

Answer

Constrictive and destructive interference

Answer

Polarization

Answer

Diffraction of sound waves

Question 22

22. The distance between node and anti-node is

Question 23

23. Waves transmit _________ from one place to another

Answer

None of these

Question 24

24. Energy is not carried by

Answer

Longitudinal vibration

Answer

Electromagnetic waves

Answer

Transverse progressive waves

Answer

Stationary waves

Question 25

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

Answer

Infra-red radiation

Answer

Visible light

Answer

Ultra-violet rays

Answer

Gamma rays

Question 26

26. ‘y’ is the ratio molar specific heat at constant pressure to the molar specific heat at constant volume and has value

Question 27

27. 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 increase

Answer

Time period will decrease

Answer

Time period will not change

Question 28

28. In simple harmonic motion,

Answer

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

Answer

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

Answer

The velocity and acceleration of 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

Question 29

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

Answer

Energy and linear momentum

Answer

Energy and mass

Answer

Energy, momentum and mass

Question 30

30. A system under going force vibrations is known as

Answer

Frequency harmonic oscillator

Answer

Vibration harmonic oscillator

Answer

Driven harmonic oscillator

Question 31

31. When a stationary wave is formed then its frequency is

Answer

Twice that of the individual waves

Answer

Same as that of the individual waves

Answer

Half that of the individual waves

Answer

√2 that of the individual waves

Question 32

32. The distance between node and antinode is

Question 33

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

Answer

When v is maximum, α is maximum

Answer

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

Answer

When v is maximum, α is zero

Answer

When v is zero, α is zero

Question 34

34. One spring has force constant 200 Nm¯¹, another has force constant 500 Nm¯¹. If they are joined in series, the force constant will be nearest to

Answer

700 Nm¯¹

Answer

100 Nm¯¹

Answer

143 Nm¯¹

Answer

300 Nm¯¹

Question 35

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

Question 36

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

Answer

Do not affect photographic plate

Answer

Cannot be polarized

Answer

Have a lower frequency

Answer

Cannot be diffracted

Question 37

37. Decibel is unit of

Answer

x-ray radiation capacity

Answer

Sound loudness

Answer

Energy of radiation

Answer

Intensity of light

Question 38

38. Sound waves in air always

Answer

Electromagnetic

Answer

Transverse

Answer

Longitudinal

Answer

Stationary

Question 39

39. 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 40

40. The gases have a

Answer

None of these

Answer

Smaller elastic modules

Answer

Large elastic modulus

Answer

Zero elastic modulus

Question 41

41. To hear a clear echo, the reflecting surface must be at a minimum distance of

Question 42

42. The velocity of sound in air depends upon

Answer

Amplitude and frequency of sound

Answer

Density and elasticity of gas

Answer

Wavelength of sound

Question 43

43. The velocity of sound is greatest in

Question 44

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

Answer

√6 times slower

Answer

6 times faster

Answer

At correct rate

Answer

√6 times faster

Question 45

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

Question 46

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

Answer

Independent of x

Question 47

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

Answer

None of these

Answer

Amplitude of motion will be very large

Answer

Independent of amplitude of motion

Answer

Amplitude of motion will be every small

Question 48

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

Answer

Increases or decreases depending on the material

Answer

Remains same

Question 49

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

Question 50

50. When two waves with same frequency and constant phase difference interfere.

Answer

There is a gain of energy

Answer

There is a loss of energy

Answer

The energy is redistributed and the distribution remains constant with time

Answer

The energy is redistributed and the distribution changes with time

Question 51

51. The human ear is most sensitive in the frequency range of:

Answer

3,000 to 6,000 Hz

Answer

4,000 to 8,000 Hz

Answer

2,000 to 4,000 Hz

Answer

5,000 to 11,000 Hz

Question 52

52. Applications of the results of scientific studies in the designs of buildings etc. is called:

Answer

Wave mechanics

Question 53

53. Through which character we can distinguish the light waves from sound waves

Answer

Refraction

Answer

Reflection

Answer

Polarization

Answer

Interference

Question 54

54. 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 55

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

Answer

Extra supersonic speed

Answer

Supersonic speed

Answer

None of these

Answer

Sonic speed

Question 56

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

Question 57

57. Silence zone takes place due to

Answer

Constructive interference

Answer

Destructive interference

Question 58

58. For production of beats the two sources must have

Answer

Different frequencies

Answer

Different frequencies and same amplitude

Answer

Different frequencies, same amplitude and same phase

Answer

Different frequencies and same phase

Question 59

59. 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 60

60. Velocity of sound in vacuum is

Question 61

61. 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

Answer

5 β – 4 α

Answer

9 (β – α)

Question 62

62. 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

√k₁k₂

Answer

k₁ k₂/( k₁+k₂)

Question 63

63. If two waves of amplitude ‘A’ produce a resultant wave of amplitude A, then the phase difference between them will be

Question 64

64. 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

Answer 166

1/T seconds

Answer 167

1/f seconds

Answer 168

Becomes zero

Answer 169

Remains unchanged

Answer 170

The elastic property but not on the inertia property

Answer 171

The elastic property as well as the inertia property

Answer 172

The inertia property but not on the elastic property

Answer 173

Neither the elastic property nor the inertia property

Answer 174

An apparent increase in frequency

Answer 175

An apparent decrease in wavelength

Answer 176

No apparent change in frequency

Answer 177

An apparent decrease in frequency

Answer 178

Both the above

Answer 179

The source is in motion

Answer 180

None of these

Answer 181

The detector is in motion

Answer 182

Doppler effect

Answer 183

Beat phenomenon

Answer 184

Interference

Answer 185

Progressive waves

Answer 186

Mechanical waves

Answer 187

Periodic waves

Answer 188

None of these

Answer 189

Rectilinear Motion

Answer 190

Circular Motion

Answer 191

Angular Motion

Answer 192

Simple Harmonic Motion

Answer 193

Reproduction of original sound

Answer 194

Reproduction of music

Answer 195

Reproduction of original image

Answer 196

Reproduction of a CD from original copy

Answer 197

Neither sound nor light wave

Answer 198

Light wave only

Answer 199

Sound wave only

Answer 200

Both sound and light waves

Answer 201

1483 ms¯¹

Answer 202

1214 ms¯¹

Answer 203

1343 ms¯¹

Answer 204

1567 ms¯¹

Answer 205

Oscillation Time

Answer 206

Time period

Answer 207

Reverberation

Answer 208

Moisture contents in air

Answer 209

The composition of air

Answer 210

The atmospheric pressure

Answer 211

Temperature of air

Answer 212

Angular Momentum

Answer 213

K.E. Energy

Answer 214

P.E. Energy

Answer 215

Total Energy

Answer 216

√k₂/k₁

Answer 217

√k₁/k₂

Answer 218

Energy is uniformly distributed

Answer 219

Energy is minimum at nodes and maximum at antinodes

Answer 220

Alternating maximum and minimum energy producing at nodes and antinodes

Answer 221

Energy is maximum at nodes and minimum at antidotes

Answer 222

Carrier waves

Answer 223

Mechanical waves

Answer 224

Matter waves

Answer 225

Electromagnetic waves

Answer 226

None of these

Answer 227

Wavelength

Answer 228

Damping force is small

Answer 229

Quality factor is small

Answer 230

Restoring force is small

Answer 231

Applied periodic force is small

Answer 232

Water waves

Answer 233

Sound waves

Answer 234

All of these

Answer 235

Light waves

Answer 236

None of these

Answer 237

Increased rapidly

Answer 238

Oscillation

Answer 239

None of these

Answer 240

Become zero

Answer 241

Remains same

Answer 242

Pressure only

Answer 243

Density only

Answer 244

Neither pressure nor density

Answer 245

Both pressure and density

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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Important Waves Question and Answer

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How to Ace the Physics Waves Online Mcqs Test?

Detailed Preparation Strategy:

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Malik Tahir

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