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

Answer

Wave length

Answer

Phase difference

Question 3

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

Answer

Rectilinear Motion

Answer

Circular Motion

Answer

Angular Motion

Answer

Simple Harmonic Motion

Question 4

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

Question 5

5. Sound waves do not travel in vacuum because

Answer

They require material medium for propagation

Answer

They are transverse waves

Answer

They are stationary waves

Answer

They do not have enough energy

Question 6

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

Question 7

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

Answer

Become zero

Answer

Remains same

Question 8

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

Answer

Independent of x

Question 9

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

Answer

Longitudinal waves

Answer

None of these

Answer

Progressive wave

Answer

Transverse wave

Question 10

10. 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 11

11. 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 depend on the weight of the boy.

Answer

Time period will not change

Answer

Time period will decrease

Answer

Time period will increase

Question 12

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

Answer

Beat phenomenon

Answer

Doppler effect

Answer

Interference

Question 13

13. 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

Can penetrate the wall

Answer

Has a definite capacity

Answer

Has a definite pitch

Answer

Has a definite quality

Question 14

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

Answer

Extra supersonic speed

Answer

None of these

Answer

Supersonic speed

Answer

Sonic speed

Question 15

15. 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 16

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

Answer

Exponential

Answer

Hyperbolic

Answer

Logarithmic

Question 17

17. Beats are the results of

Answer

Polarization

Answer

Diffraction of sound waves

Answer

Constrictive and destructive interference

Answer

Destructive interference

Question 18

18. The velocity of sound in air depends upon

Answer

Amplitude and frequency of sound

Answer

Wavelength of sound

Answer

Density and elasticity of gas

Question 19

19. 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

5 β – 4 α

Answer

9 (β – α)

Answer

5α – 4β

Question 20

20. The speed of sound in a medium depends on

Answer

Neither the elastic property nor the inertia property

Answer

The elastic property as well as the inertia property

Answer

The inertia property but not on the elastic property

Answer

The elastic property but not on the inertia property

Question 21

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

Answer

A hyperbola

Answer

An ellipse

Answer

A straight line

Question 22

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

Question 23

23. The gases have a

Answer

Smaller elastic modules

Answer

None of these

Answer

Large elastic modulus

Answer

Zero elastic modulus

Question 24

24. 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 25

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

Answer

Neither pressure nor density

Answer

Pressure only

Answer

Both pressure and density

Answer

Density only

Question 26

26. Doppler-effect applies to

Answer

Neither sound nor light wave

Answer

Both sound and light waves

Answer

Sound wave only

Answer

Light wave only

Question 27

27. In simple harmonic motion,

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

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

Question 28

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

Question 29

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

Answer

Cannot be diffracted

Answer

Do not affect photographic plate

Answer

Cannot be polarized

Answer

Have a lower frequency

Question 30

30. 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

Question 31

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

Answer

Independent of amplitude of motion

Answer

Amplitude of motion will be every small

Answer

None of these

Answer

Amplitude of motion will be very large

Question 32

32. 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 33

33. 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 34

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

Answer

Becomes zero

Answer

Remains unchanged

Question 35

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

Answer

3,000 to 6,000 Hz

Answer

2,000 to 4,000 Hz

Answer

4,000 to 8,000 Hz

Answer

5,000 to 11,000 Hz

Question 36

36. 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 gain of energy

Answer

The energy is redistributed and the distribution changes with time

Answer

There is a loss of energy

Question 37

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

Answer

The atmospheric pressure

Answer

Moisture contents in air

Answer

Temperature of air

Answer

The composition of air

Question 38

38. Velocity of sound in vacuum is

Question 39

39. For production of beats the two sources must have

Answer

Different frequencies and same amplitude

Answer

Different frequencies, same amplitude and same phase

Answer

Different frequencies and same phase

Answer

Different frequencies

Question 40

40. 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 41

41. In vibratory motion which parameter remains constant?

Answer

K.E. Energy

Answer

Total Energy

Answer

Angular Momentum

Answer

P.E. Energy

Question 42

42. Fidelity refers to

Answer

Reproduction of original image

Answer

Reproduction of original sound

Answer

Reproduction of a CD from original copy

Answer

Reproduction of music

Question 43

43. 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 44

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

Answer

Becomes Zero

Answer

Remains constant

Question 45

45. 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 46

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

Question 47

47. The Doppler effect is produced if

Answer

The source is in motion

Answer

None of these

Answer

The detector is in motion

Answer

Both the above

Question 48

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

Answer

Increased rapidly

Answer

None of these

Question 49

49. 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

No apparent change in frequency

Answer

An apparent decrease in frequency

Question 50

50. 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 slower

Answer

√6 times faster

Answer

6 times faster

Question 51

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

Question 52

52. In stationary waves

Answer

Energy is maximum at nodes and minimum at antidotes

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 antinodes

Question 53

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

Answer

Transverse progressive

Answer

Transverse stationary

Answer

Longitudinal progressive

Answer

Longitudinal stationary

Question 54

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

Answer

None of these

Answer

Wavelength

Question 55

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

Answer

Polarization

Answer

Refraction

Answer

Reflection

Answer

Interference

Question 56

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

Answer

Intensity and frequency

Answer

Frequency and velocity

Answer

Frequency and number of harmonic

Answer

Intensity and velocity

Question 57

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

Answer

Electromagnetic waves

Answer

Carrier waves

Answer

Matter waves

Answer

Mechanical waves

Question 58

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

Answer

Interference of waves

Answer

Beats phenomena

Answer

Doppler effect

Answer

All of these

Question 59

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

Answer

Oscillation

Answer

None of these

Question 60

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

Answer

Interference

Answer

Refraction

Answer

Diffraction

Answer

Polarization

Question 61

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

Answer

Diffraction

Answer

Reflection

Answer

Refraction

Answer

Polarization

Question 62

62. Decibel is unit of

Answer

Intensity of light

Answer

x-ray radiation capacity

Answer

Sound loudness

Answer

Energy of radiation

Question 63

63. Waves transmit _________ from one place to another

Answer

None of these

Question 64

64. 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

Answer 179

Energy and mass

Answer 180

Energy and linear momentum

Answer 181

Energy, momentum and mass

Answer 182

4π second

Answer 183

2π second

Answer 184

Increases or decreases depending on the material

Answer 185

Remains same

Answer 186

Quality factor is small

Answer 187

Damping force is small

Answer 188

Applied periodic force is small

Answer 189

Restoring force is small

Answer 190

Double the mass

Answer 191

Quadruple the mass

Answer 192

Reduce the mass to one fourth

Answer 193

Half the mass

Answer 194

√2 that of the individual waves

Answer 195

Same as that of the individual waves

Answer 196

Twice that of the individual waves

Answer 197

Half that of the individual waves

Answer 198

Remain unaffected

Answer 199

Become infinite

Answer 200

700 Nm¯¹

Answer 201

100 Nm¯¹

Answer 202

300 Nm¯¹

Answer 203

143 Nm¯¹

Answer 204

1/T seconds

Answer 205

1/f seconds

Answer 206

All of these

Answer 207

Sound waves

Answer 208

Light waves

Answer 209

Water waves

Answer 210

Sometimes in phase

Answer 211

None of these

Answer 212

Out of phase

Answer 213

Infra-red radiation

Answer 214

Visible light

Answer 215

Ultra-violet rays

Answer 216

Gamma rays

Answer 217

Electromagnetic

Answer 218

Stationary

Answer 219

Transverse

Answer 220

Longitudinal

Answer 221

Destructive interference

Answer 222

Constructive interference

Answer 223

Periodic waves

Answer 224

None of these

Answer 225

Mechanical waves

Answer 226

Progressive waves

Answer 227

Stationary waves

Answer 228

Transverse progressive waves

Answer 229

Longitudinal vibration

Answer 230

Electromagnetic waves

Answer 231

1214 ms¯¹

Answer 232

1567 ms¯¹

Answer 233

1343 ms¯¹

Answer 234

1483 ms¯¹

Answer 235

When v is maximum, α is maximum

Answer 236

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

Answer 237

When v is zero, α is zero

Answer 238

When v is maximum, α is zero

Answer 239

Wave mechanics

Answer 240

Driven harmonic oscillator

Answer 241

Vibration harmonic oscillator

Answer 242

Frequency harmonic oscillator

Answer 243

Reverberation

Answer 244

Oscillation Time

Answer 245

Time period

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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