Physics Waves Online Mcqs Test

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Question 1

1. 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 2

2. Sound waves do not travel in vacuum because

Answer

They require material medium for propagation

Answer

They do not have enough energy

Answer

They are stationary waves

Answer

They are transverse waves

Question 3

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

Answer

Phase difference

Answer

Wave length

Question 4

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

Answer

Hyperbolic

Answer

Logarithmic

Answer

Exponential

Question 5

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

Answer

Neither pressure nor density

Answer

Density only

Answer

Both pressure and density

Answer

Pressure only

Question 6

6. The Doppler effect is produced if

Answer

The detector is in motion

Answer

The source is in motion

Answer

Both the above

Answer

None of these

Question 7

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

Answer

Simple Harmonic Motion

Answer

Circular Motion

Answer

Rectilinear Motion

Answer

Angular Motion

Question 8

8. Velocity of sound in vacuum is

Question 9

9. 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 10

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

Question 11

11. The distance between node and antinode is

Question 12

12. 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 13

13. 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

700 Nm¯¹

Answer

143 Nm¯¹

Answer

100 Nm¯¹

Answer

300 Nm¯¹

Question 14

14. 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 15

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

Answer

Longitudinal stationary

Answer

Longitudinal progressive

Answer

Transverse stationary

Answer

Transverse progressive

Question 16

16. In case of a forced vibration, the resonance becomes very sharp when the

Answer

Restoring force is small

Answer

Applied periodic force is small

Answer

Quality factor is small

Answer

Damping force is small

Question 17

17. For production of beats the two sources must have

Answer

Different frequencies, same amplitude and same phase

Answer

Different frequencies and same amplitude

Answer

Different frequencies

Answer

Different frequencies and same phase

Question 18

18. 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 19

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

Answer

√2 that of the individual waves

Answer

Twice that of the individual waves

Answer

Same as that of the individual waves

Answer

Half that of the individual waves

Question 20

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

Question 21

21. The speed of sound in a medium depends on

Answer

Neither the elastic property nor the inertia property

Answer

The elastic property but not on the inertia property

Answer

The inertia property but not on the elastic property

Answer

The elastic property as well as the inertia property

Question 22

22. 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 23

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

Answer

Interference

Answer

Beat phenomenon

Answer

Doppler effect

Question 24

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

Answer

Zero in the mean position

Answer

None of these

Answer

Maximum in the extreme position

Question 25

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

Question 26

26. A system under going force vibrations is known as

Answer

Driven harmonic oscillator

Answer

Frequency harmonic oscillator

Answer

Vibration harmonic oscillator

Question 27

27. 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 28

28. 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 maximum

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 zero

Question 29

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

Question 30

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

Answer

Independent of amplitude of motion

Answer

Amplitude of motion will be very large

Answer

Amplitude of motion will be every small

Answer

None of these

Question 31

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

Answer

Gamma rays

Answer

Ultra-violet rays

Answer

Infra-red radiation

Answer

Visible light

Question 32

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

Answer

Beats phenomena

Answer

Doppler effect

Answer

Interference of waves

Answer

All of these

Question 33

33. 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 not change

Answer

Time period will depend on the weight of the boy.

Answer

Time period will increase

Answer

Time period will decrease

Question 34

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

Answer

Frequency and velocity

Answer

Frequency and number of harmonic

Answer

Intensity and frequency

Answer

Intensity and velocity

Question 35

35. 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 36

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

Answer

3,000 to 6,000 Hz

Answer

4,000 to 8,000 Hz

Answer

2,000 to 4,000 Hz

Answer

5,000 to 11,000 Hz

Question 37

37. Silence zone takes place due to

Answer

Constructive interference

Answer

Destructive interference

Question 38

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

Answer

Interference

Answer

Polarization

Answer

Diffraction

Answer

Refraction

Question 39

39. The distance between node and anti-node is

Question 40

40. Beats are the results of

Answer

Destructive interference

Answer

Diffraction of sound waves

Answer

Polarization

Answer

Constrictive and destructive interference

Question 41

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

Answer

Remains constant

Answer

Becomes Zero

Question 42

42. In stationary waves

Answer

Energy is maximum at nodes and minimum at antidotes

Answer

Energy is minimum at nodes and maximum at antinodes

Answer

Alternating maximum and minimum energy producing at nodes and antinodes

Answer

Energy is uniformly distributed

Question 43

43. Fidelity refers to

Answer

Reproduction of music

Answer

Reproduction of original sound

Answer

Reproduction of a CD from original copy

Answer

Reproduction of original image

Question 44

44. Waves transmit _________ from one place to another

Answer

None of these

Question 45

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

Answer

Reduce the mass to one fourth

Answer

Half the mass

Answer

Quadruple the mass

Answer

Double the mass

Question 46

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

Answer

Extra supersonic speed

Answer

Supersonic speed

Answer

Sonic speed

Answer

None of these

Question 47

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

Answer

Becomes one half

Answer

Becomes double

Answer

Become one fourth

Answer

Remains same

Question 48

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

Answer

Moisture contents in air

Answer

Temperature of air

Answer

The atmospheric pressure

Answer

The composition of air

Question 49

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

Answer

4π second

Answer

2π second

Question 50

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

Answer

Remains same

Answer

Increases or decreases depending on the material

Question 51

51. Decibel is unit of

Answer

Sound loudness

Answer

Intensity of light

Answer

Energy of radiation

Answer

x-ray radiation capacity

Question 52

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

Answer

Independent of x

Question 53

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

Answer

Cannot be polarized

Answer

Cannot be diffracted

Answer

Have a lower frequency

Answer

Do not affect photographic plate

Question 54

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

Question 55

55. 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

5 β – 4 α

Answer

5α – 4β

Question 56

56. 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 57

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

Answer

Wave mechanics

Question 58

58. 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 59

59. 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 60

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

Answer

Refraction

Answer

Interference

Answer

Reflection

Answer

Polarization

Question 61

61. An oscillating mass-spring system generates

Answer

Mechanical waves

Answer

Periodic waves

Answer

None of these

Answer

Progressive waves

Question 62

62. The gases have a

Answer

Zero elastic modulus

Answer

Smaller elastic modules

Answer

Large elastic modulus

Answer

None of these

Question 63

63. 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 64

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

Answer

Sometimes in phase

Answer

Out of phase

Answer

None of these

Answer 173

1/T seconds

Answer 174

1/f seconds

Answer 175

Light wave only

Answer 176

Sound wave only

Answer 177

Neither sound nor light wave

Answer 178

Both sound and light waves

Answer 179

None of these

Answer 180

Transverse wave

Answer 181

Longitudinal waves

Answer 182

Progressive wave

Answer 183

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

Answer 184

The velocity and acceleration of the vibrating particle are in the same phase

Answer 185

The velocity and displacement of the vibrating particle are in the same phase

Answer 186

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

Answer 187

None of these

Answer 188

Oscillation

Answer 189

At correct rate

Answer 190

√6 times slower

Answer 191

√6 times faster

Answer 192

6 times faster

Answer 193

k₁ k₂/( k₁+k₂)

Answer 194

(k₁+k₂)/2

Answer 195

√k₁k₂

Answer 196

A hyperbola

Answer 197

An ellipse

Answer 198

A straight line

Answer 199

Has a definite quality

Answer 200

Has a definite capacity

Answer 201

Has a definite pitch

Answer 202

Can penetrate the wall

Answer 203

No apparent change in frequency

Answer 204

An apparent decrease in frequency

Answer 205

An apparent decrease in wavelength

Answer 206

An apparent increase in frequency

Answer 207

None of these

Answer 208

Wavelength

Answer 209

Remains unchanged

Answer 210

Becomes zero

Answer 211

Sound waves

Answer 212

All of these

Answer 213

Water waves

Answer 214

Light waves

Answer 215

Time period

Answer 216

Oscillation Time

Answer 217

Reverberation

Answer 218

Transverse progressive waves

Answer 219

Electromagnetic waves

Answer 220

Longitudinal vibration

Answer 221

Stationary waves

Answer 222

Energy is minimum at nodes and maximum at antidotes

Answer 223

Alternating maximum and minimum energy producing at nodes and antinodes

Answer 224

Energy is uniformly distributed

Answer 225

Energy is minimum at nodes and maximum at antinodes

Answer 226

Become infinite

Answer 227

Remain unaffected

Answer 228

Total Energy

Answer 229

K.E. Energy

Answer 230

P.E. Energy

Answer 231

Angular Momentum

Answer 232

1483 ms¯¹

Answer 233

1343 ms¯¹

Answer 234

1567 ms¯¹

Answer 235

1214 ms¯¹

Answer 236

Increased rapidly

Answer 237

None of these

Answer 238

Reflection

Answer 239

Diffraction

Answer 240

Refraction

Answer 241

Polarization

Answer 242

Transverse

Answer 243

Longitudinal

Answer 244

Stationary

Answer 245

Electromagnetic

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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