Physics Waves Online Mcqs Test

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Question 1

1. The distance between node and antinode is

Question 2

2. In vibratory motion which parameter remains constant?

Answer

Total Energy

Answer

K.E. Energy

Answer

P.E. Energy

Answer

Angular Momentum

Question 3

3. 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 4

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

Question 5

5. Velocity of sound in vacuum is

Question 6

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

Question 7

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

Answer

Phase difference

Answer

Wave length

Question 8

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

Answer

2,000 to 4,000 Hz

Answer

5,000 to 11,000 Hz

Answer

3,000 to 6,000 Hz

Answer

4,000 to 8,000 Hz

Question 9

9. 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 10

10. 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 quality

Answer

Has a definite pitch

Answer

Can penetrate the wall

Answer

Has a definite capacity

Question 11

11. 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 12

12. 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 13

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

Answer

4π second

Answer

2π second

Question 14

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

Answer

Remains same

Answer

Increases or decreases depending on the material

Question 15

15. Fidelity refers to

Answer

Reproduction of original sound

Answer

Reproduction of music

Answer

Reproduction of original image

Answer

Reproduction of a CD from original copy

Question 16

16. Sound waves do not travel in vacuum because

Answer

They do not have enough energy

Answer

They are transverse waves

Answer

They require material medium for propagation

Answer

They are stationary waves

Question 17

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

Answer

Ultra-violet rays

Answer

Gamma rays

Answer

Visible light

Answer

Infra-red radiation

Question 18

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

Question 19

19. 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 20

20. 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

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

Answer

When v is maximum, α is maximum

Answer

When v is maximum, α is zero

Question 21

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

Answer

Becomes double

Answer

Become one fourth

Answer

Remains same

Answer

Becomes one half

Question 22

22. What sort of waves exhibit the Doppler effect?

Answer

Light waves

Answer

Sound waves

Answer

Water waves

Answer

All of these

Question 23

23. 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

Sonic speed

Answer

Supersonic speed

Question 24

24. 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

700 Nm¯¹

Answer

143 Nm¯¹

Question 25

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

Question 26

26. 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 loss of energy

Answer

There is a gain of energy

Answer

The energy is redistributed and the distribution changes with time

Question 27

27. 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

Become infinite

Answer

Remain unaffected

Question 28

28. An oscillating mass-spring system generates

Answer

None of these

Answer

Progressive waves

Answer

Mechanical waves

Answer

Periodic waves

Question 29

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

Answer

Increased rapidly

Answer

None of these

Question 30

30. Decibel is unit of

Answer

Energy of radiation

Answer

Sound loudness

Answer

Intensity of light

Answer

x-ray radiation capacity

Question 31

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

Answer

None of these

Answer

Sometimes in phase

Answer

Out of phase

Question 32

32. Waves transmit _________ from one place to another

Answer

None of these

Question 33

33. 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 34

34. A pendulum clock that keeps correct time on the Earth is taken to the Moon. It will run

Answer

6 times faster

Answer

√6 times faster

Answer

At correct rate

Answer

√6 times slower

Question 35

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

Question 36

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

Question 37

37. 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 38

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

Answer

Independent of x

Question 39

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

Answer

None of these

Answer

Oscillation

Question 40

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

Answer

Cannot be polarized

Answer

Do not affect photographic plate

Answer

Have a lower frequency

Answer

Cannot be diffracted

Question 41

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

Answer

Wave mechanics

Question 42

42. 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 43

43. 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 44

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

Answer

Interference

Answer

Doppler effect

Answer

Beat phenomenon

Question 45

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

Answer

1/T seconds

Answer

1/f seconds

Question 46

46. The velocity of sound is greatest in

Question 47

47. Doppler-effect applies to

Answer

Light wave only

Answer

Both sound and light waves

Answer

Sound wave only

Answer

Neither sound nor light wave

Question 48

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

Answer

An apparent decrease in frequency

Answer

No apparent change in frequency

Answer

An apparent increase in frequency

Answer

An apparent decrease in wavelength

Question 49

49. Beats are the results of

Answer

Diffraction of sound waves

Answer

Polarization

Answer

Constrictive and destructive interference

Answer

Destructive interference

Question 50

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

Answer

Wavelength

Answer

None of these

Question 51

51. The Doppler effect is produced if

Answer

The source is in motion

Answer

The detector is in motion

Answer

None of these

Answer

Both the above

Question 52

52. Energy is not carried by

Answer

Stationary waves

Answer

Longitudinal vibration

Answer

Transverse progressive waves

Answer

Electromagnetic waves

Question 53

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

Answer

Logarithmic

Answer

Exponential

Answer

Hyperbolic

Question 54

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

Answer

Diffraction

Answer

Interference

Answer

Polarization

Answer

Refraction

Question 55

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

Answer

Circular Motion

Answer

Rectilinear Motion

Answer

Angular Motion

Answer

Simple Harmonic Motion

Question 56

56. A system under going force vibrations is known as

Answer

Driven harmonic oscillator

Answer

Frequency harmonic oscillator

Answer

Vibration harmonic oscillator

Question 57

57. The speed of sound in a medium depends on

Answer

The inertia property but not on the elastic property

Answer

Neither the elastic property nor the inertia property

Answer

The elastic property but not on the inertia property

Answer

The elastic property as well as the inertia property

Question 58

58. The distance between node and anti-node is

Question 59

59. In stationary waves

Answer

Energy is minimum at nodes and maximum at antidotes

Answer

Energy is uniformly distributed

Answer

Energy is minimum at nodes and maximum at antinodes

Answer

Alternating maximum and minimum energy producing at nodes and antinodes

Question 60

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

Question 61

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

Answer

Frequency and velocity

Answer

Intensity and frequency

Answer

Intensity and velocity

Answer

Frequency and number of harmonic

Question 62

62. 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 63

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

Answer

Displacement is maximum

Answer

Crossing mean position

Answer

Half way between them

Question 64

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

Answer 158

Diffraction

Answer 159

Reflection

Answer 160

Refraction

Answer 161

Polarization

Answer 162

All of these

Answer 163

Doppler effect

Answer 164

Interference of waves

Answer 165

Beats phenomena

Answer 166

Pressure only

Answer 167

Both pressure and density

Answer 168

Neither pressure nor density

Answer 169

Density only

Answer 170

Large elastic modulus

Answer 171

Smaller elastic modules

Answer 172

Zero elastic modulus

Answer 173

None of these

Answer 174

Destructive interference

Answer 175

Constructive interference

Answer 176

Time period

Answer 177

Oscillation Time

Answer 178

Reverberation

Answer 179

Refraction

Answer 180

Polarization

Answer 181

Reflection

Answer 182

Interference

Answer 183

Reduce the mass to one fourth

Answer 184

Double the mass

Answer 185

Half the mass

Answer 186

Quadruple the mass

Answer 187

Twice that of the individual waves

Answer 188

Half that of the individual waves

Answer 189

Same as that of the individual waves

Answer 190

√2 that of the individual waves

Answer 191

Becomes Zero

Answer 192

Remains constant

Answer 193

Carrier waves

Answer 194

Mechanical waves

Answer 195

Matter waves

Answer 196

Electromagnetic waves

Answer 197

None of these

Answer 198

Longitudinal waves

Answer 199

Progressive wave

Answer 200

Transverse wave

Answer 201

Transverse stationary

Answer 202

Longitudinal progressive

Answer 203

Transverse progressive

Answer 204

Longitudinal stationary

Answer 205

Alternating maximum and minimum energy producing at nodes and antinodes

Answer 206

Energy is uniformly distributed

Answer 207

Energy is maximum at nodes and minimum at antidotes

Answer 208

Energy is minimum at nodes and maximum at antinodes

Answer 209

Damping force is small

Answer 210

Restoring force is small

Answer 211

Applied periodic force is small

Answer 212

Quality factor is small

Answer 213

1567 ms¯¹

Answer 214

1214 ms¯¹

Answer 215

1343 ms¯¹

Answer 216

1483 ms¯¹

Answer 217

Remains same

Answer 218

Become zero

Answer 219

Amplitude of motion will be very large

Answer 220

Independent of amplitude of motion

Answer 221

Amplitude of motion will be every small

Answer 222

None of these

Answer 223

A straight line

Answer 224

An ellipse

Answer 225

A hyperbola

Answer 226

Different frequencies and same amplitude

Answer 227

Different frequencies and same phase

Answer 228

Different frequencies, same amplitude and same phase

Answer 229

Different frequencies

Answer 230

Time period will depend on the weight of the boy.

Answer 231

Time period will decrease

Answer 232

Time period will not change

Answer 233

Time period will increase

Answer 234

k₁ k₂/( k₁+k₂)

Answer 235

(k₁+k₂)/2

Answer 236

√k₁k₂

Answer 237

Stationary

Answer 238

Transverse

Answer 239

Longitudinal

Answer 240

Electromagnetic

Answer 241

Becomes zero

Answer 242

Remains unchanged

Answer 243

5 β – 4 α

Answer 244

5α – 4β

Answer 245

9 (β – 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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