Physics Waves Online Mcqs Test

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Question 1

1. Velocity of sound in vacuum is

Question 2

2. 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 3

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

Answer

Do not affect photographic plate

Answer

Have a lower frequency

Answer

Cannot be polarized

Answer

Cannot be diffracted

Question 4

4. 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 5

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

Answer

Displacement is maximum

Answer

Half way between them

Answer

Crossing mean position

Question 6

6. 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 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. Sound waves in air always

Answer

Transverse

Answer

Longitudinal

Answer

Electromagnetic

Answer

Stationary

Question 9

9. 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 slower

Answer

6 times faster

Question 10

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

Answer

Visible light

Answer

Infra-red radiation

Answer

Ultra-violet rays

Answer

Gamma rays

Question 11

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

Question 12

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

Answer

2π second

Answer

4π second

Question 13

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

Answer

Polarization

Answer

Reflection

Answer

Refraction

Answer

Interference

Question 14

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

Question 15

15. 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 16

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

Answer

Interference

Answer

Doppler effect

Answer

Beat phenomenon

Question 17

17. 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 18

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

Answer

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

Question 19

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

Answer

Logarithmic

Answer

Exponential

Answer

Hyperbolic

Question 20

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

Answer

Wavelength

Answer

None of these

Question 21

21. For production of beats the two sources must have

Answer

Different frequencies and same amplitude

Answer

Different frequencies and same phase

Answer

Different frequencies, same amplitude and same phase

Answer

Different frequencies

Question 22

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

Answer

Increased rapidly

Answer

None of these

Question 23

23. The distance between node and anti-node is

Question 24

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

Answer

Mechanical waves

Answer

Carrier waves

Answer

Matter waves

Answer

Electromagnetic waves

Question 25

25. 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 zero

Answer

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

Answer

When v is zero, α is zero

Answer

When v is maximum, α is maximum

Question 26

26. 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 27

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

Answer

Half the mass

Answer

Double the mass

Answer

Quadruple the mass

Answer

Reduce the mass to one fourth

Question 28

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

Answer

Remains same

Answer

Increases or decreases depending on the material

Question 29

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

Answer

Wave length

Answer

Phase difference

Question 30

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

Question 31

31. The Doppler effect is produced if

Answer

None of these

Answer

The source is in motion

Answer

The detector is in motion

Answer

Both the above

Question 32

32. Silence zone takes place due to

Answer

Constructive interference

Answer

Destructive interference

Question 33

33. 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 34

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

Answer

An ellipse

Answer

A straight line

Answer

A hyperbola

Question 35

35. 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 36

36. 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

100 Nm¯¹

Answer

143 Nm¯¹

Answer

700 Nm¯¹

Question 37

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

Answer

5,000 to 11,000 Hz

Answer

3,000 to 6,000 Hz

Answer

4,000 to 8,000 Hz

Answer

2,000 to 4,000 Hz

Question 38

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

Answer

1/f seconds

Answer

1/T seconds

Question 39

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

Answer

Time period

Answer

Oscillation Time

Answer

Reverberation

Question 40

40. The gases have a

Answer

Smaller elastic modules

Answer

None of these

Answer

Zero elastic modulus

Answer

Large elastic modulus

Question 41

41. Energy is not carried by

Answer

Electromagnetic waves

Answer

Longitudinal vibration

Answer

Transverse progressive waves

Answer

Stationary waves

Question 42

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

Question 43

43. In vibratory motion which parameter remains constant?

Answer

Angular Momentum

Answer

Total Energy

Answer

K.E. Energy

Answer

P.E. Energy

Question 44

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

Answer

Independent of x

Question 45

45. In stationary waves

Answer

Energy is minimum at nodes and maximum at antinodes

Answer

Energy is maximum at nodes and minimum at antidotes

Answer

Energy is uniformly distributed

Answer

Alternating maximum and minimum energy producing at nodes and antinodes

Question 46

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

Question 47

47. In stationary waves

Answer

Energy is minimum at nodes and maximum at antidotes

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 antinodes

Question 48

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

Answer

All of these

Answer

Interference of waves

Answer

Doppler effect

Answer

Beats phenomena

Question 49

49. An oscillating mass-spring system generates

Answer

Mechanical waves

Answer

Periodic waves

Answer

None of these

Answer

Progressive waves

Question 50

50. 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 51

51. The speed of sound in a medium depends on

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

Answer

Neither the elastic property nor the inertia property

Question 52

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

Question 53

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

Answer

Supersonic speed

Answer

None of these

Answer

Extra supersonic speed

Answer

Sonic speed

Question 54

54. Fidelity refers to

Answer

Reproduction of original image

Answer

Reproduction of original sound

Answer

Reproduction of music

Answer

Reproduction of a CD from original copy

Question 55

55. Waves transmit _________ from one place to another

Answer

None of these

Question 56

56. The velocity of sound is greatest in

Question 57

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

Answer

Become one fourth

Answer

Becomes one half

Answer

Remains same

Answer

Becomes double

Question 58

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

Answer

An apparent increase in frequency

Answer

An apparent decrease in wavelength

Answer

No apparent change in frequency

Answer

An apparent decrease in frequency

Question 59

59. What sort of waves exhibit the Doppler effect?

Answer

Water waves

Answer

All of these

Answer

Sound waves

Answer

Light waves

Question 60

60. Beats are the results of

Answer

Destructive interference

Answer

Polarization

Answer

Diffraction of sound waves

Answer

Constrictive and destructive interference

Question 61

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

Question 62

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

Question 63

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

Question 64

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

Answer

Pressure only

Answer

Both pressure and density

Answer

Neither pressure nor density

Answer

Density only

Answer 158

The composition of air

Answer 159

Moisture contents in air

Answer 160

Temperature of air

Answer 161

The atmospheric pressure

Answer 162

Time period will increase

Answer 163

Time period will depend on the weight of the boy.

Answer 164

Time period will not change

Answer 165

Time period will decrease

Answer 166

Remains unchanged

Answer 167

Becomes zero

Answer 168

Energy and mass

Answer 169

Energy, momentum and mass

Answer 170

Energy and linear momentum

Answer 171

1343 ms¯¹

Answer 172

1567 ms¯¹

Answer 173

1483 ms¯¹

Answer 174

1214 ms¯¹

Answer 175

Becomes Zero

Answer 176

Remains constant

Answer 177

√k₂/k₁

Answer 178

√k₁/k₂

Answer 179

Polarization

Answer 180

Refraction

Answer 181

Interference

Answer 182

Diffraction

Answer 183

Refraction

Answer 184

Diffraction

Answer 185

Polarization

Answer 186

Reflection

Answer 187

Has a definite pitch

Answer 188

Has a definite capacity

Answer 189

Has a definite quality

Answer 190

Can penetrate the wall

Answer 191

Both sound and light waves

Answer 192

Sound wave only

Answer 193

Neither sound nor light wave

Answer 194

Light wave only

Answer 195

Transverse progressive

Answer 196

Transverse stationary

Answer 197

Longitudinal stationary

Answer 198

Longitudinal progressive

Answer 199

Oscillation

Answer 200

None of these

Answer 201

Wave mechanics

Answer 202

Sound loudness

Answer 203

x-ray radiation capacity

Answer 204

Energy of radiation

Answer 205

Intensity of light

Answer 206

They are transverse waves

Answer 207

They are stationary waves

Answer 208

They require material medium for propagation

Answer 209

They do not have enough energy

Answer 210

Become zero

Answer 211

Remains same

Answer 212

Zero in the mean position

Answer 213

None of these

Answer 214

Maximum in the extreme position

Answer 215

Transverse wave

Answer 216

None of these

Answer 217

Longitudinal waves

Answer 218

Progressive wave

Answer 219

Damping force is small

Answer 220

Quality factor is small

Answer 221

Applied periodic force is small

Answer 222

Restoring force is small

Answer 223

Vibration harmonic oscillator

Answer 224

Frequency harmonic oscillator

Answer 225

Driven harmonic oscillator

Answer 226

Simple Harmonic Motion

Answer 227

Rectilinear Motion

Answer 228

Circular Motion

Answer 229

Angular Motion

Answer 230

Become infinite

Answer 231

Remain unaffected

Answer 232

The energy is redistributed and the distribution remains constant with time

Answer 233

There is a gain of energy

Answer 234

The energy is redistributed and the distribution changes with time

Answer 235

There is a loss of energy

Answer 236

(k₁+k₂)/2

Answer 237

√k₁k₂

Answer 238

k₁ k₂/( k₁+k₂)

Answer 239

Amplitude of motion will be every small

Answer 240

None of these

Answer 241

Independent of amplitude of motion

Answer 242

Amplitude of motion will be very large

Answer 243

5α – 4β

Answer 244

9 (β – α)

Answer 245

5 β – 4 α

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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