Physics Waves Online Mcqs Test

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Question 1

1. 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 2

2. 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 3

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

Answer

Remains constant

Answer

Becomes Zero

Question 4

4. 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 5

5. An oscillating mass-spring system generates

Answer

Periodic waves

Answer

Mechanical waves

Answer

None of these

Answer

Progressive waves

Question 6

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

Answer

An apparent increase in frequency

Answer

No apparent change in frequency

Answer

An apparent decrease in wavelength

Answer

An apparent decrease in frequency

Question 7

7. Decibel is unit of

Answer

Intensity of light

Answer

Sound loudness

Answer

Energy of radiation

Answer

x-ray radiation capacity

Question 8

8. Waves transmit _________ from one place to another

Answer

None of these

Question 9

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

Answer

Amplitude of motion will be very large

Answer

None of these

Answer

Amplitude of motion will be every small

Answer

Independent of amplitude of motion

Question 10

10. Silence zone takes place due to

Answer

Constructive interference

Answer

Destructive interference

Question 11

11. 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 capacity

Answer

Has a definite pitch

Answer

Can penetrate the wall

Answer

Has a definite quality

Question 12

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

Answer

Oscillation Time

Answer

Reverberation

Answer

Time period

Question 13

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

Answer

Independent of x

Question 14

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

Answer

4π second

Answer

2π second

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. 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 and acceleration 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

Question 17

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

Answer

Quadruple the mass

Answer

Reduce the mass to one fourth

Answer

Double the mass

Answer

Half the mass

Question 18

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

Answer

Have a lower frequency

Answer

Cannot be polarized

Answer

Cannot be diffracted

Answer

Do not affect photographic plate

Question 19

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

Answer

Density only

Answer

Pressure only

Answer

Neither pressure nor density

Answer

Both pressure and density

Question 20

20. The distance between node and anti-node is

Question 21

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

Question 22

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

Question 23

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

Question 24

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

Answer

Polarization

Answer

Refraction

Answer

Reflection

Answer

Diffraction

Question 25

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

Answer

Increases or decreases depending on the material

Answer

Remains same

Question 26

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

Answer

None of these

Answer

Increased rapidly

Question 27

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

Answer

There is a gain of energy

Answer

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 28

28. 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 29

29. 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 30

30. 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 31

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

Answer

Matter waves

Answer

Electromagnetic waves

Answer

Mechanical waves

Answer

Carrier waves

Question 32

32. 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 33

33. The velocity of sound is greatest in

Question 34

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

Question 35

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

Answer

Gamma rays

Answer

Ultra-violet rays

Answer

Visible light

Answer

Infra-red radiation

Question 36

36. Fidelity refers to

Answer

Reproduction of original image

Answer

Reproduction of a CD from original copy

Answer

Reproduction of original sound

Answer

Reproduction of music

Question 37

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

Question 38

38. 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

√k₂/k₁

Answer

√k₁/k₂

Question 39

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

Answer

Half way between them

Answer

Crossing mean position

Answer

Displacement is maximum

Question 40

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

Question 41

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

Answer

Hyperbolic

Answer

Exponential

Answer

Logarithmic

Question 42

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

Question 43

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

Answer

Frequency and velocity

Answer

Frequency and number of harmonic

Answer

Intensity and velocity

Answer

Intensity and frequency

Question 44

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

Answer

Simple Harmonic Motion

Answer

Circular Motion

Answer

Angular Motion

Answer

Rectilinear Motion

Question 45

45. 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 zero, α is zero

Answer

When v is maximum, α is maximum

Answer

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

Answer

When v is maximum, α is zero

Question 46

46. 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 47

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

Answer

The atmospheric pressure

Answer

Moisture contents in air

Answer

The composition of air

Answer

Temperature of air

Question 48

48. 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

5α – 4β

Answer

5 β – 4 α

Question 49

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

Answer

Wave length

Answer

Phase difference

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

Supersonic speed

Answer

Sonic speed

Answer

Extra supersonic speed

Question 51

51. 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

5,000 to 11,000 Hz

Answer

3,000 to 6,000 Hz

Question 52

52. 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 53

53. A system under going force vibrations is known as

Answer

Vibration harmonic oscillator

Answer

Driven harmonic oscillator

Answer

Frequency harmonic oscillator

Question 54

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

Answer

None of these

Answer

Wavelength

Question 55

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

Answer

Progressive wave

Answer

Longitudinal waves

Answer

None of these

Answer

Transverse wave

Question 56

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

Answer

Refraction

Answer

Polarization

Answer

Reflection

Answer

Interference

Question 57

57. 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 58

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

Answer

Maximum in the extreme position

Answer

Zero in the mean position

Answer

None of these

Question 59

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

Question 60

60. The gases have a

Answer

Large elastic modulus

Answer

Smaller elastic modules

Answer

Zero elastic modulus

Answer

None of these

Question 61

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

Answer

1567 ms¯¹

Answer

1483 ms¯¹

Answer

1214 ms¯¹

Answer

1343 ms¯¹

Question 62

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

Answer

Same as that of the individual waves

Answer

Half that of the individual waves

Answer

√2 that of the individual waves

Answer

Twice that of the individual waves

Question 63

63. 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 64

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

Answer

Polarization

Answer

Refraction

Answer

Diffraction

Answer

Interference

Answer 158

Damping force is small

Answer 159

Applied periodic force is small

Answer 160

Restoring force is small

Answer 161

Quality factor is small

Answer 162

Stationary waves

Answer 163

Transverse progressive waves

Answer 164

Electromagnetic waves

Answer 165

Longitudinal vibration

Answer 166

The source is in motion

Answer 167

Both the above

Answer 168

None of these

Answer 169

The detector is in motion

Answer 170

Oscillation

Answer 171

None of these

Answer 172

1/T seconds

Answer 173

1/f seconds

Answer 174

Energy is uniformly distributed

Answer 175

Alternating maximum and minimum energy producing at nodes and antinodes

Answer 176

Energy is minimum at nodes and maximum at antinodes

Answer 177

Energy is maximum at nodes and minimum at antidotes

Answer 178

Becomes double

Answer 179

Remains same

Answer 180

Becomes one half

Answer 181

Become one fourth

Answer 182

Light wave only

Answer 183

Neither sound nor light wave

Answer 184

Both sound and light waves

Answer 185

Sound wave only

Answer 186

Destructive interference

Answer 187

Diffraction of sound waves

Answer 188

Polarization

Answer 189

Constrictive and destructive interference

Answer 190

They are transverse waves

Answer 191

They do not have enough energy

Answer 192

They are stationary waves

Answer 193

They require material medium for propagation

Answer 194

Angular Momentum

Answer 195

Total Energy

Answer 196

K.E. Energy

Answer 197

P.E. Energy

Answer 198

Transverse progressive

Answer 199

Transverse stationary

Answer 200

Longitudinal stationary

Answer 201

Longitudinal progressive

Answer 202

Energy is minimum at nodes and maximum at antinodes

Answer 203

Alternating maximum and minimum energy producing at nodes and antinodes

Answer 204

Energy is uniformly distributed

Answer 205

Energy is minimum at nodes and maximum at antidotes

Answer 206

The elastic property as well as the inertia property

Answer 207

The elastic property but not on the inertia property

Answer 208

The inertia property but not on the elastic property

Answer 209

Neither the elastic property nor the inertia property

Answer 210

Remain unaffected

Answer 211

Become infinite

Answer 212

Doppler effect

Answer 213

Beat phenomenon

Answer 214

Interference

Answer 215

Different frequencies, same amplitude and same phase

Answer 216

Different frequencies and same amplitude

Answer 217

Different frequencies

Answer 218

Different frequencies and same phase

Answer 219

Becomes zero

Answer 220

Remains unchanged

Answer 221

Longitudinal

Answer 222

Stationary

Answer 223

Electromagnetic

Answer 224

Transverse

Answer 225

700 Nm¯¹

Answer 226

143 Nm¯¹

Answer 227

300 Nm¯¹

Answer 228

100 Nm¯¹

Answer 229

√6 times faster

Answer 230

6 times faster

Answer 231

√6 times slower

Answer 232

At correct rate

Answer 233

All of these

Answer 234

Doppler effect

Answer 235

Beats phenomena

Answer 236

Interference of waves

Answer 237

Time period will increase

Answer 238

Time period will decrease

Answer 239

Time period will not change

Answer 240

Time period will depend on the weight of the boy.

Answer 241

Wave mechanics

Answer 242

Light waves

Answer 243

Water waves

Answer 244

Sound waves

Answer 245

All of these

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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Physics Waves Online Mcqs Test

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Important Waves Question and Answer

Physics Waves Practice Test Online With Explanation

Physics

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Malik Tahir

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