Physics Waves Online Mcqs Test

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Question 1

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

Answer

Interference

Answer

Refraction

Answer

Polarization

Answer

Diffraction

Question 2

2. In stationary waves

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Energy is minimum at nodes and maximum at antinodes

Answer

Energy is minimum at nodes and maximum at antidotes

Answer

Alternating maximum and minimum energy producing at nodes and antinodes

Answer

Energy is uniformly distributed

Question 3

3. Reflection of radar waves from the aero planes is an example of

Answer

Doppler effect

Answer

Interference

Answer

Beat phenomenon

Question 4

4. In vibratory motion which parameter remains constant?

Answer

P.E. Energy

Answer

Total Energy

Answer

Angular Momentum

Answer

K.E. Energy

Question 5

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

Answer

All of these

Answer

Beats phenomena

Answer

Doppler effect

Answer

Interference of waves

Question 6

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

Question 7

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

Answer

Ultra-violet rays

Answer

Infra-red radiation

Answer

Visible light

Answer

Gamma rays

Question 8

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

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Longitudinal stationary

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Transverse stationary

Answer

Longitudinal progressive

Answer

Transverse progressive

Question 9

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

Question 10

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

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Frequency and velocity

Answer

Intensity and frequency

Answer

Intensity and velocity

Answer

Frequency and number of harmonic

Question 11

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

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The composition of air

Answer

The atmospheric pressure

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Temperature of air

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Moisture contents in air

Question 12

12. 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 13

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

Answer

Refraction

Answer

Interference

Answer

Polarization

Answer

Reflection

Question 14

14. An oscillating mass-spring system generates

Answer

None of these

Answer

Mechanical waves

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Periodic waves

Answer

Progressive waves

Question 15

15. Velocity of sound in vacuum is

Question 16

16. The gases have a

Answer

None of these

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Zero elastic modulus

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Smaller elastic modules

Answer

Large elastic modulus

Question 17

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

Question 18

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

Answer

Remains constant

Answer

Becomes Zero

Question 19

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

Answer

Rectilinear Motion

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Circular Motion

Answer

Simple Harmonic Motion

Answer

Angular Motion

Question 20

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

Answer

Becomes zero

Answer

Remains unchanged

Question 21

21. 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 22

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

Question 23

23. 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

Can penetrate the wall

Answer

Has a definite capacity

Answer

Has a definite quality

Answer

Has a definite pitch

Question 24

24. 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 25

25. In simple harmonic motion,

Answer

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

Answer

The velocity and displacement 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

Answer

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

Question 26

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

Question 27

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

Question 28

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

Answer

An apparent increase in frequency

Answer

An apparent decrease in frequency

Answer

No apparent change in frequency

Answer

An apparent decrease in wavelength

Question 29

29. Doppler-effect applies to

Answer

Sound wave only

Answer

Light wave only

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Neither sound nor light wave

Answer

Both sound and light waves

Question 30

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

Answer

Reflection

Answer

Polarization

Answer

Refraction

Answer

Diffraction

Question 31

31. The beats frequency (sensible) for a human car is

Question 32

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

Answer

Half that of the individual waves

Answer

Twice that of the individual waves

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Same as that of the individual waves

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√2 that of the individual waves

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

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

Answer

When v is maximum, α is maximum

Answer

When v is zero, α is zero

Answer

When v is maximum, α is zero

Question 34

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

Answer

Crossing mean position

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Displacement is maximum

Answer

Half way between them

Question 35

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

Answer

Become zero

Answer

Remains same

Question 36

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

Question 37

37. 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

Transverse wave

Answer

Progressive wave

Answer

Longitudinal waves

Question 38

38. 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 39

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

Answer

6 times faster

Answer

At correct rate

Answer

√6 times slower

Answer

√6 times faster

Question 40

40. Silence zone takes place due to

Answer

Destructive interference

Answer

Constructive interference

Question 41

41. 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

143 Nm¯¹

Answer

300 Nm¯¹

Answer

100 Nm¯¹

Question 42

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

Answer

Half the mass

Answer

Quadruple the mass

Answer

Reduce the mass to one fourth

Answer

Double the mass

Question 43

43. Sound waves do not travel in vacuum because

Answer

They require material medium for propagation

Answer

They are stationary waves

Answer

They do not have enough energy

Answer

They are transverse waves

Question 44

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

Question 45

45. One wavelength is the distance covered in a time is called

Answer

Oscillation Time

Answer

Reverberation

Answer

Time period

Question 46

46. Fidelity refers to

Answer

Reproduction of original image

Answer

Reproduction of music

Answer

Reproduction of original sound

Answer

Reproduction of a CD from original copy

Question 47

47. What sort of waves exhibit the Doppler effect?

Answer

All of these

Answer

Light waves

Answer

Water waves

Answer

Sound waves

Question 48

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

Answer

Amplitude of motion will be every small

Answer

None of these

Answer

Amplitude of motion will be very large

Answer

Independent of amplitude of motion

Question 49

49. Beats are the results of

Answer

Polarization

Answer

Diffraction of sound waves

Answer

Destructive interference

Answer

Constrictive and destructive interference

Question 50

50. 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 51

51. The velocity of sound in air depends upon

Answer

Amplitude and frequency of sound

Answer

Wavelength of sound

Answer

Density and elasticity of gas

Question 52

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

Answer

Becomes one half

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Becomes double

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Remains same

Answer

Become one fourth

Question 53

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

Answer

Oscillation

Answer

None of these

Question 54

54. Sound waves in air always

Answer

Electromagnetic

Answer

Longitudinal

Answer

Stationary

Answer

Transverse

Question 55

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

Question 56

56. The distance between node and antinode is

Question 57

57. Decibel is unit of

Answer

Sound loudness

Answer

x-ray radiation capacity

Answer

Intensity of light

Answer

Energy of radiation

Question 58

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

Answer

None of these

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Extra supersonic speed

Answer

Supersonic speed

Answer

Sonic speed

Question 59

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

Answer

Electromagnetic waves

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Mechanical waves

Answer

Matter waves

Answer

Carrier waves

Question 60

60. The Doppler effect is produced if

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The detector is in motion

Answer

None of these

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The source is in motion

Answer

Both the above

Question 61

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

Answer

Do not affect photographic plate

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Cannot be diffracted

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Cannot be polarized

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Have a lower frequency

Question 62

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

Answer

There is a gain of energy

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The energy is redistributed and the distribution remains constant with time

Answer

There is a loss of energy

Answer

The energy is redistributed and the distribution changes with time

Question 63

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

Answer

1/f seconds

Answer

1/T seconds

Question 64

64. 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:

Answer 176

Out of phase

Answer 177

None of these

Answer 178

Sometimes in phase

Answer 179

√k₁k₂

Answer 180

(k₁+k₂)/2

Answer 181

k₁ k₂/( k₁+k₂)

Answer 182

√k₁/k₂

Answer 183

√k₂/k₁

Answer 184

9 (β – α)

Answer 185

5α – 4β

Answer 186

5 β – 4 α

Answer 187

Quality factor is small

Answer 188

Applied periodic force is small

Answer 189

Restoring force is small

Answer 190

Damping force is small

Answer 191

Energy, momentum and mass

Answer 192

Energy and linear momentum

Answer 193

Energy and mass

Answer 194

4π second

Answer 195

2π second

Answer 196

Maximum in the extreme position

Answer 197

Zero in the mean position

Answer 198

None of these

Answer 199

Energy is maximum at nodes and minimum at antidotes

Answer 200

Energy is minimum at nodes and maximum at antinodes

Answer 201

Alternating maximum and minimum energy producing at nodes and antinodes

Answer 202

Energy is uniformly distributed

Answer 203

Exponential

Answer 204

Hyperbolic

Answer 205

Logarithmic

Answer 206

5,000 to 11,000 Hz

Answer 207

4,000 to 8,000 Hz

Answer 208

3,000 to 6,000 Hz

Answer 209

2,000 to 4,000 Hz

Answer 210

Transverse progressive waves

Answer 211

Longitudinal vibration

Answer 212

Stationary waves

Answer 213

Electromagnetic waves

Answer 214

None of these

Answer 215

Wavelength

Answer 216

Driven harmonic oscillator

Answer 217

Frequency harmonic oscillator

Answer 218

Vibration harmonic oscillator

Answer 219

None of these

Answer 220

Increased rapidly

Answer 221

Increases or decreases depending on the material

Answer 222

Remains same

Answer 223

1214 ms¯¹

Answer 224

1567 ms¯¹

Answer 225

1343 ms¯¹

Answer 226

1483 ms¯¹

Answer 227

Wave mechanics

Answer 228

Become infinite

Answer 229

Remain unaffected

Answer 230

Different frequencies, same amplitude and same phase

Answer 231

Different frequencies

Answer 232

Different frequencies and same phase

Answer 233

Different frequencies and same amplitude

Answer 234

The inertia property but not on the elastic property

Answer 235

The elastic property as well as the inertia property

Answer 236

Neither the elastic property nor the inertia property

Answer 237

The elastic property but not on the inertia property

Answer 238

None of these

Answer 239

Independent of x

Answer 240

Wave length

Answer 241

Phase difference

Answer 242

Density only

Answer 243

Both pressure and density

Answer 244

Pressure only

Answer 245

Neither pressure nor 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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