Physics Waves Online Mcqs Test

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Question 1

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

Answer

An apparent decrease in wavelength

Answer

An apparent increase in frequency

Answer

An apparent decrease in frequency

Answer

No apparent change in frequency

Question 2

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

Answer

Quadruple the mass

Answer

Half the mass

Answer

Reduce the mass to one fourth

Answer

Double the mass

Question 3

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

Answer

Interference

Answer

Refraction

Answer

Polarization

Answer

Diffraction

Question 4

4. 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 decrease

Answer

Time period will depend on the weight of the boy.

Answer

Time period will not change

Answer

Time period will increase

Question 5

5. The Doppler effect is produced if

Answer

The detector is in motion

Answer

Both the above

Answer

None of these

Answer

The source is in motion

Question 6

6. In vibratory motion which parameter remains constant?

Answer

P.E. Energy

Answer

K.E. Energy

Answer

Total Energy

Answer

Angular Momentum

Question 7

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

Answer

Rectilinear Motion

Answer

Circular Motion

Answer

Simple Harmonic Motion

Answer

Angular Motion

Question 8

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

Answer

Intensity and velocity

Answer

Frequency and number of harmonic

Answer

Intensity and frequency

Answer

Frequency and velocity

Question 9

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

Question 10

10. An oscillating mass-spring system generates

Answer

None of these

Answer

Progressive waves

Answer

Periodic waves

Answer

Mechanical waves

Question 11

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

Answer

Energy and mass

Answer

Energy and linear momentum

Answer

Energy, momentum and mass

Question 12

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

Answer

None of these

Answer

Sonic speed

Answer

Supersonic speed

Answer

Extra supersonic speed

Question 13

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

Answer

1/T seconds

Answer

1/f seconds

Question 14

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

Answer

Amplitude of motion will be very large

Answer

Independent of amplitude of motion

Answer

Amplitude of motion will be every small

Answer

None of these

Question 15

15. 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 maximum, α is zero

Answer

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

Answer

When v is zero, α is zero

Question 16

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

Answer

Remains same

Answer

Increases or decreases depending on the material

Question 17

17. The gases have a

Answer

Large elastic modulus

Answer

Zero elastic modulus

Answer

None of these

Answer

Smaller elastic modules

Question 18

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

Answer

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

Question 19

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

Answer

Matter waves

Answer

Mechanical waves

Answer

Electromagnetic waves

Answer

Carrier waves

Question 20

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

Answer

Reflection

Answer

Refraction

Answer

Interference

Answer

Polarization

Question 21

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

Answer

Reverberation

Answer

Time period

Answer

Oscillation Time

Question 22

22. Energy is not carried by

Answer

Transverse progressive waves

Answer

Electromagnetic waves

Answer

Stationary waves

Answer

Longitudinal vibration

Question 23

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

Question 24

24. A system under going force vibrations is known as

Answer

Driven harmonic oscillator

Answer

Frequency harmonic oscillator

Answer

Vibration harmonic oscillator

Question 25

25. 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 26

26. Beats are the results of

Answer

Destructive interference

Answer

Diffraction of sound waves

Answer

Polarization

Answer

Constrictive and destructive interference

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

Question 29

29. The distance between node and antinode is

Question 30

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

Answer

Becomes Zero

Answer

Remains constant

Question 31

31. 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 32

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

Answer

Cannot be diffracted

Answer

Have a lower frequency

Answer

Cannot be polarized

Answer

Do not affect photographic plate

Question 33

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

Answer

Beat phenomenon

Answer

Doppler effect

Answer

Interference

Question 34

34. 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 35

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

Answer

√2 that of the individual waves

Answer

Twice that of the individual waves

Answer

Same as that of the individual waves

Answer

Half that of the individual waves

Question 36

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

Answer

Remains unchanged

Answer

Becomes zero

Question 37

37. 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/( k₁+k₂)

Answer

√k₁k₂

Question 38

38. The distance between node and anti-node is

Question 39

39. What sort of waves exhibit the Doppler effect?

Answer

Water waves

Answer

Sound waves

Answer

All of these

Answer

Light waves

Question 40

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

Answer

Independent of x

Question 41

41. The velocity of sound is greatest in

Question 42

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

Answer

A straight line

Answer

An ellipse

Answer

A hyperbola

Question 43

43. 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

9 (β – α)

Answer

5 β – 4 α

Answer

5α – 4β

Question 44

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

Answer

None of these

Answer

Wavelength

Question 45

45. Velocity of sound in vacuum is

Question 46

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

Answer

Become one fourth

Answer

Remains same

Answer

Becomes one half

Answer

Becomes double

Question 47

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

Answer

Wave mechanics

Question 48

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

Answer

4,000 to 8,000 Hz

Answer

2,000 to 4,000 Hz

Answer

3,000 to 6,000 Hz

Answer

5,000 to 11,000 Hz

Question 49

49. Decibel is unit of

Answer

Sound loudness

Answer

Energy of radiation

Answer

Intensity of light

Answer

x-ray radiation capacity

Question 50

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

Answer

Transverse progressive

Answer

Longitudinal stationary

Answer

Longitudinal progressive

Answer

Transverse stationary

Question 51

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

Answer

Transverse wave

Answer

None of these

Answer

Longitudinal waves

Answer

Progressive wave

Question 52

52. In stationary waves

Answer

Energy is minimum at nodes and maximum at antinodes

Answer

Alternating maximum and minimum energy producing at nodes and antinodes

Answer

Energy is uniformly distributed

Answer

Energy is maximum at nodes and minimum at antidotes

Question 53

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

Question 54

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

Question 55

55. 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 56

56. The velocity of sound in air depends upon

Answer

Density and elasticity of gas

Answer

Wavelength of sound

Answer

Amplitude and frequency of sound

Question 57

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

Answer

Hyperbolic

Answer

Logarithmic

Answer

Exponential

Question 58

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

Answer

Out of phase

Answer

Sometimes in phase

Answer

None of these

Question 59

59. Fidelity refers to

Answer

Reproduction of a CD from original copy

Answer

Reproduction of original sound

Answer

Reproduction of music

Answer

Reproduction of original image

Question 60

60. 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 61

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

Answer

At correct rate

Answer

6 times faster

Answer

√6 times faster

Answer

√6 times slower

Question 62

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

Answer

Refraction

Answer

Diffraction

Answer

Reflection

Answer

Polarization

Question 63

63. 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 64

64. Two particles A and B of equal masses are suspended from two mass less springs of spring constants k₁ and k₂ respectively. If the maximum velocities, during oscillation, are equal, the ratio of amplitudes of A and B is:

Answer

√k₁/k₂

Answer

√k₂/k₁

Answer 178

Increased rapidly

Answer 179

None of these

Answer 180

Has a definite pitch

Answer 181

Can penetrate the wall

Answer 182

Has a definite capacity

Answer 183

Has a definite quality

Answer 184

Constructive interference

Answer 185

Destructive interference

Answer 186

Displacement is maximum

Answer 187

Crossing mean position

Answer 188

Half way between them

Answer 189

Beats phenomena

Answer 190

All of these

Answer 191

Interference of waves

Answer 192

Doppler effect

Answer 193

Both pressure and density

Answer 194

Density only

Answer 195

Pressure only

Answer 196

Neither pressure nor density

Answer 197

Damping force is small

Answer 198

Restoring force is small

Answer 199

Applied periodic force is small

Answer 200

Quality factor is small

Answer 201

Stationary

Answer 202

Electromagnetic

Answer 203

Longitudinal

Answer 204

Transverse

Answer 205

Both sound and light waves

Answer 206

Sound wave only

Answer 207

Neither sound nor light wave

Answer 208

Light wave only

Answer 209

There is a loss of energy

Answer 210

The energy is redistributed and the distribution remains constant with time

Answer 211

The energy is redistributed and the distribution changes with time

Answer 212

There is a gain of energy

Answer 213

1567 ms¯¹

Answer 214

1483 ms¯¹

Answer 215

1343 ms¯¹

Answer 216

1214 ms¯¹

Answer 217

None of these

Answer 218

Oscillation

Answer 219

Moisture contents in air

Answer 220

The atmospheric pressure

Answer 221

The composition of air

Answer 222

Temperature of air

Answer 223

They are transverse waves

Answer 224

They require material medium for propagation

Answer 225

They are stationary waves

Answer 226

They do not have enough energy

Answer 227

700 Nm¯¹

Answer 228

143 Nm¯¹

Answer 229

100 Nm¯¹

Answer 230

300 Nm¯¹

Answer 231

Become infinite

Answer 232

Remain unaffected

Answer 233

Different frequencies

Answer 234

Different frequencies and same amplitude

Answer 235

Different frequencies and same phase

Answer 236

Different frequencies, same amplitude and same phase

Answer 237

4π second

Answer 238

2π second

Answer 239

None of these

Answer 240

Wave length

Answer 241

Phase difference

Answer 242

Visible light

Answer 243

Gamma rays

Answer 244

Ultra-violet rays

Answer 245

Infra-red radiation

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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Malik Tahir

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