Physics Waves Online Mcqs Test

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Question 1

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

Answer

Hyperbolic

Answer

Logarithmic

Answer

Exponential

Question 2

2. 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 decrease

Answer

Time period will increase

Answer

Time period will not change

Question 3

3. 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 4

4. 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 5

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

Answer

Crossing mean position

Answer

Displacement is maximum

Answer

Half way between them

Question 6

6. 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 7

7. The Doppler effect is produced if

Answer

None of these

Answer

Both the above

Answer

The source is in motion

Answer

The detector is in motion

Question 8

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

Answer

Twice that of the individual waves

Answer

√2 that of the individual waves

Answer

Same as that of the individual waves

Answer

Half that of the individual waves

Question 9

9. In stationary waves

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

Answer

Energy is maximum at nodes and minimum at antidotes

Question 10

10. A system under going force vibrations is known as

Answer

Driven harmonic oscillator

Answer

Frequency harmonic oscillator

Answer

Vibration harmonic oscillator

Question 11

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

Answer

Refraction

Answer

Interference

Answer

Polarization

Answer

Diffraction

Question 12

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

Answer

Circular Motion

Answer

Angular Motion

Answer

Simple Harmonic Motion

Answer

Rectilinear Motion

Question 13

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

Answer

Oscillation Time

Answer

Time period

Answer

Reverberation

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

Answer

Refraction

Answer

Reflection

Answer

Diffraction

Answer

Polarization

Question 16

16. In simple harmonic motion,

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 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. Silence zone takes place due to

Answer

Constructive interference

Answer

Destructive interference

Question 18

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

Question 19

19. 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 20

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

Answer

Increased rapidly

Answer

None of these

Question 21

21. The gases have a

Answer

Smaller elastic modules

Answer

None of these

Answer

Zero elastic modulus

Answer

Large elastic modulus

Question 22

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

Question 23

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

Answer

2,000 to 4,000 Hz

Answer

3,000 to 6,000 Hz

Answer

5,000 to 11,000 Hz

Answer

4,000 to 8,000 Hz

Question 24

24. 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 25

25. Doppler-effect applies to

Answer

Both sound and light waves

Answer

Neither sound nor light wave

Answer

Light wave only

Answer

Sound wave only

Question 26

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

Answer

Remains constant

Answer

Becomes Zero

Question 27

27. 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 28

28. 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 29

29. An oscillating mass-spring system generates

Answer

Mechanical waves

Answer

Progressive waves

Answer

Periodic waves

Answer

None of these

Question 30

30. 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 31

31. The velocity of sound is greatest in

Question 32

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

Question 33

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

Answer

Remains unchanged

Answer

Becomes zero

Question 34

34. Sound waves do not travel in vacuum because

Answer

They are stationary waves

Answer

They do not have enough energy

Answer

They are transverse waves

Answer

They require material medium for propagation

Question 35

35. 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 36

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

Answer

Maximum in the extreme position

Answer

None of these

Answer

Zero in the mean position

Question 37

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

Answer

Wavelength

Answer

None of these

Question 38

38. Waves transmit _________ from one place to another

Answer

None of these

Question 39

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

Answer

Energy and linear momentum

Answer

Energy, momentum and mass

Answer

Energy and mass

Question 40

40. Sound waves in air always

Answer

Longitudinal

Answer

Stationary

Answer

Electromagnetic

Answer

Transverse

Question 41

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

Answer

None of these

Answer

Amplitude of motion will be very large

Answer

Amplitude of motion will be every small

Answer

Independent of amplitude of motion

Question 42

42. 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

100 Nm¯¹

Answer

143 Nm¯¹

Answer

300 Nm¯¹

Answer

700 Nm¯¹

Question 43

43. 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 44

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

Question 45

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

Answer

Polarization

Answer

Reflection

Answer

Interference

Answer

Refraction

Question 46

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

Answer

Transverse wave

Answer

Progressive wave

Answer

Longitudinal waves

Answer

None of these

Question 47

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

Answer

1/f seconds

Answer

1/T seconds

Question 48

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

Answer

Becomes double

Answer

Becomes one half

Answer

Become one fourth

Answer

Remains same

Question 49

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

Answer

Longitudinal stationary

Answer

Transverse stationary

Answer

Transverse progressive

Answer

Longitudinal progressive

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

Extra supersonic speed

Answer

Sonic speed

Question 51

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

Answer

Electromagnetic waves

Answer

Mechanical waves

Answer

Carrier waves

Answer

Matter waves

Question 52

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

Answer

Independent of x

Question 53

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

Question 54

54. 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 55

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

Answer

Phase difference

Answer

Wave length

Question 56

56. For production of beats the two sources must have

Answer

Different frequencies

Answer

Different frequencies and same amplitude

Answer

Different frequencies and same phase

Answer

Different frequencies, same amplitude and same phase

Question 57

57. 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 58

58. Energy is not carried by

Answer

Longitudinal vibration

Answer

Electromagnetic waves

Answer

Stationary waves

Answer

Transverse progressive waves

Question 59

59. Velocity of sound in vacuum is

Question 60

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

Answer

Visible light

Answer

Gamma rays

Answer

Ultra-violet rays

Answer

Infra-red radiation

Question 61

61. 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 changes with time

Answer

There is a loss of energy

Answer

The energy is redistributed and the distribution remains constant with time

Question 62

62. 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 63

63. 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 quality

Answer

Has a definite capacity

Answer

Can penetrate the wall

Question 64

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

Answer

Remains same

Answer

Increases or decreases depending on the material

Answer 176

Frequency and velocity

Answer 177

Intensity and velocity

Answer 178

Frequency and number of harmonic

Answer 179

Intensity and frequency

Answer 180

1214 ms¯¹

Answer 181

1567 ms¯¹

Answer 182

1483 ms¯¹

Answer 183

1343 ms¯¹

Answer 184

None of these

Answer 185

Sometimes in phase

Answer 186

Out of phase

Answer 187

Energy is minimum at nodes and maximum at antinodes

Answer 188

Alternating maximum and minimum energy producing at nodes and antinodes

Answer 189

Energy is uniformly distributed

Answer 190

Energy is minimum at nodes and maximum at antidotes

Answer 191

An apparent increase in frequency

Answer 192

An apparent decrease in frequency

Answer 193

No apparent change in frequency

Answer 194

An apparent decrease in wavelength

Answer 195

5 β – 4 α

Answer 196

5α – 4β

Answer 197

9 (β – α)

Answer 198

Sound loudness

Answer 199

Energy of radiation

Answer 200

Intensity of light

Answer 201

x-ray radiation capacity

Answer 202

Reproduction of a CD from original copy

Answer 203

Reproduction of music

Answer 204

Reproduction of original sound

Answer 205

Reproduction of original image

Answer 206

Wave mechanics

Answer 207

Destructive interference

Answer 208

Constrictive and destructive interference

Answer 209

Polarization

Answer 210

Diffraction of sound waves

Answer 211

Interference

Answer 212

Beat phenomenon

Answer 213

Doppler effect

Answer 214

Pressure only

Answer 215

Both pressure and density

Answer 216

Density only

Answer 217

Neither pressure nor density

Answer 218

Light waves

Answer 219

All of these

Answer 220

Water waves

Answer 221

Sound waves

Answer 222

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

Answer 223

When v is maximum, α is maximum

Answer 224

When v is maximum, α is zero

Answer 225

When v is zero, α is zero

Answer 226

The elastic property but not on the inertia property

Answer 227

The elastic property as well as the inertia property

Answer 228

The inertia property but not on the elastic property

Answer 229

Neither the elastic property nor the inertia property

Answer 230

Applied periodic force is small

Answer 231

Restoring force is small

Answer 232

Damping force is small

Answer 233

Quality factor is small

Answer 234

Cannot be polarized

Answer 235

Cannot be diffracted

Answer 236

Do not affect photographic plate

Answer 237

Have a lower frequency

Answer 238

4π second

Answer 239

2π second

Answer 240

Oscillation

Answer 241

None of these

Answer 242

P.E. Energy

Answer 243

Total Energy

Answer 244

Angular Momentum

Answer 245

K.E. Energy

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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