Physics Waves Online Mcqs Test

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Question 1

1. The velocity of sound in air depends upon

Answer

Wavelength of sound

Answer

Amplitude and frequency of sound

Answer

Density and elasticity of gas

Question 2

2. 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 3

3. Sound waves in air always

Answer

Transverse

Answer

Longitudinal

Answer

Stationary

Answer

Electromagnetic

Question 4

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

Question 5

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

Question 6

6. In simple harmonic motion,

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

Answer

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

Question 7

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

Question 8

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

Answer

1/f seconds

Answer

1/T seconds

Question 9

9. In vibratory motion which parameter remains constant?

Answer

P.E. Energy

Answer

Angular Momentum

Answer

Total Energy

Answer

K.E. Energy

Question 10

10. Sound waves do not travel in vacuum because

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They require material medium for propagation

Answer

They are transverse waves

Answer

They do not have enough energy

Answer

They are stationary waves

Question 11

11. 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 12

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

Answer

Doppler effect

Answer

Interference

Answer

Beat phenomenon

Question 13

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

Question 14

14. 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

300 Nm¯¹

Answer

100 Nm¯¹

Answer

143 Nm¯¹

Question 15

15. 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 16

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

Answer

Twice that of the individual waves

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Half that of the individual waves

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√2 that of the individual waves

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Same as that of the individual waves

Question 17

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

Answer

√k₁k₂

Answer

(k₁+k₂)/2

Answer

k₁ k₂/( k₁+k₂)

Question 18

18. What sort of waves exhibit the Doppler effect?

Answer

All of these

Answer

Light waves

Answer

Water waves

Answer

Sound waves

Question 19

19. An oscillating mass-spring system generates

Answer

None of these

Answer

Progressive waves

Answer

Periodic waves

Answer

Mechanical waves

Question 20

20. 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 21

21. 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, momentum and mass

Answer

Energy and linear momentum

Question 22

22. Fidelity refers to

Answer

Reproduction of music

Answer

Reproduction of a CD from original copy

Answer

Reproduction of original image

Answer

Reproduction of original sound

Question 23

23. In stationary waves

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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 minimum at nodes and maximum at antidotes

Question 24

24. 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 25

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

Answer

Phase difference

Answer

Wave length

Question 26

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

Answer

Exponential

Answer

Hyperbolic

Answer

Logarithmic

Question 27

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

Answer

Remains constant

Answer

Becomes Zero

Question 28

28. Energy is not carried by

Answer

Electromagnetic waves

Answer

Longitudinal vibration

Answer

Stationary waves

Answer

Transverse progressive waves

Question 29

29. 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 30

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

Answer

Diffraction

Answer

Reflection

Answer

Refraction

Answer

Polarization

Question 31

31. Velocity of sound in vacuum is

Question 32

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

Answer

Remains same

Answer

Becomes double

Answer

Become one fourth

Answer

Becomes one half

Question 33

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

Answer

None of these

Answer

Oscillation

Question 34

34. 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 35

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

Answer

2π second

Answer

4π second

Question 36

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

Answer

Interference

Answer

Refraction

Answer

Polarization

Answer

Reflection

Question 37

37. Beats are the results of

Answer

Diffraction of sound waves

Answer

Constrictive and destructive interference

Answer

Polarization

Answer

Destructive interference

Question 38

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

Answer

None of these

Answer

Increased rapidly

Question 39

39. The speed of sound in a medium depends on

Answer

Neither the elastic property nor the inertia property

Answer

The inertia property but not on the elastic property

Answer

The elastic property but not on the inertia property

Answer

The elastic property as well as the inertia property

Question 40

40. Silence zone takes place due to

Answer

Destructive interference

Answer

Constructive interference

Question 41

41. 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 42

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

Answer

Remains unchanged

Answer

Becomes zero

Question 43

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

Answer

1214 ms¯¹

Answer

1343 ms¯¹

Answer

1567 ms¯¹

Answer

1483 ms¯¹

Question 44

44. For production of beats the two sources must have

Answer

Different frequencies, same amplitude and same phase

Answer

Different frequencies

Answer

Different frequencies and same amplitude

Answer

Different frequencies and same phase

Question 45

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

Answer

Reverberation

Answer

Oscillation Time

Answer

Time period

Question 46

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

Question 47

47. Waves transmit _________ from one place to another

Answer

None of these

Question 48

48. 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 49

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

Question 50

50. 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

Extra supersonic speed

Answer

Supersonic speed

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

Answer

Wave mechanics

Question 53

53. The gases have a

Answer

Large elastic modulus

Answer

Smaller elastic modules

Answer

None of these

Answer

Zero elastic modulus

Question 54

54. The Doppler effect is produced if

Answer

The detector is in motion

Answer

The source is in motion

Answer

None of these

Answer

Both the above

Question 55

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

Answer

Increases or decreases depending on the material

Answer

Remains same

Question 56

56. 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 57

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

Answer

Density only

Answer

Neither pressure nor density

Answer

Both pressure and density

Answer

Pressure only

Question 58

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

Answer

Frequency and number of harmonic

Answer

Intensity and frequency

Answer

Frequency and velocity

Answer

Intensity and velocity

Question 59

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

Question 60

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

Answer

None of these

Answer

Out of phase

Answer

Sometimes in phase

Question 61

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

Answer

The atmospheric pressure

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Temperature of air

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Moisture contents in air

Answer

The composition of air

Question 62

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

Answer

Wavelength

Answer

None of these

Question 63

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

Answer

Restoring force is small

Answer

Quality factor is small

Answer

Applied periodic force is small

Answer

Damping force is small

Question 64

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

Answer

Refraction

Answer

Interference

Answer

Diffraction

Answer

Polarization

Answer 172

Transverse progressive

Answer 173

Longitudinal stationary

Answer 174

Transverse stationary

Answer 175

Longitudinal progressive

Answer 176

2,000 to 4,000 Hz

Answer 177

3,000 to 6,000 Hz

Answer 178

4,000 to 8,000 Hz

Answer 179

5,000 to 11,000 Hz

Answer 180

Reduce the mass to one fourth

Answer 181

Half the mass

Answer 182

Double the mass

Answer 183

Quadruple the mass

Answer 184

An apparent increase in frequency

Answer 185

An apparent decrease in wavelength

Answer 186

No apparent change in frequency

Answer 187

An apparent decrease in frequency

Answer 188

Become zero

Answer 189

Remains same

Answer 190

Circular Motion

Answer 191

Rectilinear Motion

Answer 192

Simple Harmonic Motion

Answer 193

Angular Motion

Answer 194

Time period will increase

Answer 195

Time period will decrease

Answer 196

Time period will not change

Answer 197

Time period will depend on the weight of the boy.

Answer 198

Displacement is maximum

Answer 199

Half way between them

Answer 200

Crossing mean position

Answer 201

Alternating maximum and minimum energy producing at nodes and antinodes

Answer 202

Energy is uniformly distributed

Answer 203

Energy is maximum at nodes and minimum at antidotes

Answer 204

Energy is minimum at nodes and maximum at antinodes

Answer 205

Neither sound nor light wave

Answer 206

Sound wave only

Answer 207

Light wave only

Answer 208

Both sound and light waves

Answer 209

Independent of x

Answer 210

Doppler effect

Answer 211

Interference of waves

Answer 212

Beats phenomena

Answer 213

All of these

Answer 214

Sound loudness

Answer 215

Intensity of light

Answer 216

x-ray radiation capacity

Answer 217

Energy of radiation

Answer 218

Cannot be diffracted

Answer 219

Have a lower frequency

Answer 220

Do not affect photographic plate

Answer 221

Cannot be polarized

Answer 222

When v is zero, α is zero

Answer 223

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

Answer 224

When v is maximum, α is zero

Answer 225

When v is maximum, α is maximum

Answer 226

√6 times faster

Answer 227

At correct rate

Answer 228

√6 times slower

Answer 229

6 times faster

Answer 230

Frequency harmonic oscillator

Answer 231

Vibration harmonic oscillator

Answer 232

Driven harmonic oscillator

Answer 233

Zero in the mean position

Answer 234

Maximum in the extreme position

Answer 235

None of these

Answer 236

Transverse wave

Answer 237

Longitudinal waves

Answer 238

None of these

Answer 239

Progressive wave

Answer 240

There is a loss of energy

Answer 241

The energy is redistributed and the distribution changes with time

Answer 242

The energy is redistributed and the distribution remains constant with time

Answer 243

There is a gain of energy

Answer 244

√k₁/k₂

Answer 245

√k₂/k₁

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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