Physics Waves Online Mcqs Test

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Question 1

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

Answer

Infra-red radiation

Answer

Gamma rays

Answer

Ultra-violet rays

Answer

Visible light

Question 2

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

Answer

A straight line

Answer

A hyperbola

Answer

An ellipse

Question 3

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

Question 4

4. Silence zone takes place due to

Answer

Constructive interference

Answer

Destructive interference

Question 5

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

Answer

6 times faster

Answer

√6 times faster

Answer

At correct rate

Answer

√6 times slower

Question 6

6. Doppler-effect applies to

Answer

Light wave only

Answer

Neither sound nor light wave

Answer

Sound wave only

Answer

Both sound and light waves

Question 7

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

Answer

Independent of x

Question 8

8. 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

When v is zero, α is zero

Answer

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

Answer

When v is maximum, α is zero

Question 9

9. The Doppler effect is produced if

Answer

The detector is in motion

Answer

Both the above

Answer

The source is in motion

Answer

None of these

Question 10

10. 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

Answer

Time period will depend on the weight of the boy.

Answer

Time period will increase

Answer

Time period will decrease

Question 11

11. 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 12

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

Question 13

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

Answer

2,000 to 4,000 Hz

Answer

5,000 to 11,000 Hz

Answer

3,000 to 6,000 Hz

Answer

4,000 to 8,000 Hz

Question 14

14. For production of beats the two sources must have

Answer

Different frequencies and same amplitude

Answer

Different frequencies

Answer

Different frequencies, same amplitude and same phase

Answer

Different frequencies and same phase

Question 15

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

Answer

Both pressure and density

Answer

Neither pressure nor density

Answer

Pressure only

Answer

Density only

Question 16

16. A system under going force vibrations is known as

Answer

Vibration harmonic oscillator

Answer

Driven harmonic oscillator

Answer

Frequency harmonic oscillator

Question 17

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

Answer

Becomes double

Answer

Become one fourth

Answer

Becomes one half

Answer

Remains same

Question 18

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

Answer

Remains same

Answer

Become zero

Question 19

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

Answer

Cannot be polarized

Answer

Do not affect photographic plate

Answer

Have a lower frequency

Answer

Cannot be diffracted

Question 20

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

Answer

Same as that of the individual waves

Answer

Twice that of the individual waves

Answer

Half that of the individual waves

Answer

√2 that of the individual waves

Question 21

21. 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 22

22. 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 23

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

Question 24

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

Question 25

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

Answer

Quadruple the mass

Answer

Double the mass

Answer

Half the mass

Answer

Reduce the mass to one fourth

Question 26

26. 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 27

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

Answer

Sonic speed

Answer

Extra supersonic speed

Answer

None of these

Answer

Supersonic speed

Question 28

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

Answer

1/T seconds

Answer

1/f seconds

Question 29

29. 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

300 Nm¯¹

Answer

143 Nm¯¹

Answer

100 Nm¯¹

Answer

700 Nm¯¹

Question 30

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

Answer

The energy is redistributed and the distribution remains constant with time

Answer

There is a loss of energy

Answer

There is a gain of energy

Answer

The energy is redistributed and the distribution changes with time

Question 31

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

Answer

Oscillation Time

Answer

Reverberation

Answer

Time period

Question 32

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

Question 33

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

Answer

Oscillation

Answer

None of these

Question 34

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

Answer

Remains constant

Answer

Becomes Zero

Question 35

35. The speed of sound in a medium depends on

Answer

The inertia property but not on the elastic property

Answer

Neither the elastic property nor the inertia property

Answer

The elastic property as well as the inertia property

Answer

The elastic property but not on the inertia property

Question 36

36. Beats are the results of

Answer

Diffraction of sound waves

Answer

Destructive interference

Answer

Polarization

Answer

Constrictive and destructive interference

Question 37

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

Question 38

38. Waves transmit _________ from one place to another

Answer

None of these

Question 39

39. The gases have a

Answer

Smaller elastic modules

Answer

None of these

Answer

Zero elastic modulus

Answer

Large elastic modulus

Question 40

40. Sound waves in air always

Answer

Electromagnetic

Answer

Transverse

Answer

Longitudinal

Answer

Stationary

Question 41

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

Answer

Becomes zero

Answer

Remains unchanged

Question 42

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

Answer

The atmospheric pressure

Answer

Temperature of air

Answer

The composition of air

Answer

Moisture contents in air

Question 43

43. Energy is not carried by

Answer

Longitudinal vibration

Answer

Electromagnetic waves

Answer

Stationary waves

Answer

Transverse progressive waves

Question 44

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

Answer

Circular Motion

Answer

Angular Motion

Answer

Simple Harmonic Motion

Answer

Rectilinear Motion

Question 45

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

Answer

Hyperbolic

Answer

Logarithmic

Answer

Exponential

Question 46

46. What sort of waves exhibit the Doppler effect?

Answer

Light waves

Answer

Sound waves

Answer

Water waves

Answer

All of these

Question 47

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

Answer

4π second

Answer

2π second

Question 48

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

Answer

Crossing mean position

Answer

Half way between them

Answer

Displacement is maximum

Question 49

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

Question 50

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

Answer

None of these

Answer

Zero in the mean position

Answer

Maximum in the extreme position

Question 51

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

Answer

Independent of amplitude of motion

Answer

None of these

Answer

Amplitude of motion will be very large

Answer

Amplitude of motion will be every small

Question 52

52. The distance between node and anti-node is

Question 53

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

Answer

Longitudinal stationary

Answer

Transverse stationary

Answer

Longitudinal progressive

Answer

Transverse progressive

Question 54

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

Question 55

55. The distance between two consecutive crests or trough is called

Answer

Wavelength

Answer

None of these

Question 56

56. In vibratory motion which parameter remains constant?

Answer

Total Energy

Answer

K.E. Energy

Answer

P.E. Energy

Answer

Angular Momentum

Question 57

57. Decibel is unit of

Answer

x-ray radiation capacity

Answer

Sound loudness

Answer

Intensity of light

Answer

Energy of radiation

Question 58

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

Answer

Polarization

Answer

Refraction

Answer

Reflection

Answer

Interference

Question 59

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

Answer

Polarization

Answer

Diffraction

Answer

Interference

Answer

Refraction

Question 60

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

Answer

None of these

Answer

Sometimes in phase

Answer

Out of phase

Question 61

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

Answer

Matter waves

Answer

Carrier waves

Answer

Mechanical waves

Answer

Electromagnetic waves

Question 62

62. Velocity of sound in vacuum is

Question 63

63. 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

Longitudinal waves

Answer

Progressive wave

Answer

Transverse wave

Question 64

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

Answer

Remains same

Answer

Increases or decreases depending on the material

Answer 176

They are transverse waves

Answer 177

They require material medium for propagation

Answer 178

They are stationary waves

Answer 179

They do not have enough energy

Answer 180

Reproduction of original image

Answer 181

Reproduction of a CD from original copy

Answer 182

Reproduction of original sound

Answer 183

Reproduction of music

Answer 184

Become infinite

Answer 185

Remain unaffected

Answer 186

An apparent decrease in wavelength

Answer 187

An apparent decrease in frequency

Answer 188

No apparent change in frequency

Answer 189

An apparent increase in frequency

Answer 190

Intensity and frequency

Answer 191

Frequency and number of harmonic

Answer 192

Frequency and velocity

Answer 193

Intensity and velocity

Answer 194

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

Answer 195

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

Answer 196

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

Answer 197

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

Answer 198

Energy, momentum and mass

Answer 199

Energy and linear momentum

Answer 200

Energy and mass

Answer 201

Has a definite capacity

Answer 202

Can penetrate the wall

Answer 203

Has a definite pitch

Answer 204

Has a definite quality

Answer 205

Wave length

Answer 206

Phase difference

Answer 207

Alternating maximum and minimum energy producing at nodes and antinodes

Answer 208

Energy is minimum at nodes and maximum at antinodes

Answer 209

Energy is maximum at nodes and minimum at antidotes

Answer 210

Energy is uniformly distributed

Answer 211

Interference

Answer 212

Beat phenomenon

Answer 213

Doppler effect

Answer 214

Energy is minimum at nodes and maximum at antinodes

Answer 215

Alternating maximum and minimum energy producing at nodes and antinodes

Answer 216

Energy is minimum at nodes and maximum at antidotes

Answer 217

Energy is uniformly distributed

Answer 218

√k₁/k₂

Answer 219

√k₂/k₁

Answer 220

1567 ms¯¹

Answer 221

1483 ms¯¹

Answer 222

1214 ms¯¹

Answer 223

1343 ms¯¹

Answer 224

None of these

Answer 225

Increased rapidly

Answer 226

All of these

Answer 227

Doppler effect

Answer 228

Interference of waves

Answer 229

Beats phenomena

Answer 230

Mechanical waves

Answer 231

None of these

Answer 232

Periodic waves

Answer 233

Progressive waves

Answer 234

5 β – 4 α

Answer 235

5α – 4β

Answer 236

9 (β – α)

Answer 237

Restoring force is small

Answer 238

Damping force is small

Answer 239

Applied periodic force is small

Answer 240

Quality factor is small

Answer 241

Wave mechanics

Answer 242

Polarization

Answer 243

Reflection

Answer 244

Refraction

Answer 245

Diffraction

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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Malik Tahir

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