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. An oscillating mass-spring system generates

Answer

Periodic waves

Answer

None of these

Answer

Progressive waves

Answer

Mechanical waves

Question 3

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

Answer

Remains constant

Answer

Becomes Zero

Question 4

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

Question 5

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

Answer

Both pressure and density

Answer

Neither pressure nor density

Answer

Density only

Answer

Pressure only

Question 6

6. Sound waves do not travel in vacuum because

Answer

They require material medium for propagation

Answer

They are stationary waves

Answer

They are transverse waves

Answer

They do not have enough energy

Question 7

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

Question 8

8. 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 9

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

Answer

2π second

Answer

4π second

Question 10

10. 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 zero

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

Question 11

11. 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 12

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

Answer

1/T seconds

Answer

1/f seconds

Question 13

13. 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 14

14. 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 15

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

Answer

Interference of waves

Answer

All of these

Answer

Doppler effect

Answer

Beats phenomena

Question 16

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

Answer

1483 ms¯¹

Answer

1214 ms¯¹

Answer

1567 ms¯¹

Answer

1343 ms¯¹

Question 17

17. 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 pitch

Answer

Has a definite capacity

Answer

Has a definite quality

Question 18

18. The speed of sound in a medium depends on

Answer

The inertia property but not on the elastic property

Answer

The elastic property but not on the inertia property

Answer

Neither the elastic property nor the inertia property

Answer

The elastic property as well as the inertia property

Question 19

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

Question 20

20. 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 21

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

Answer

Visible light

Answer

Ultra-violet rays

Answer

Gamma rays

Answer

Infra-red radiation

Question 22

22. 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

300 Nm¯¹

Answer

100 Nm¯¹

Question 23

23. Silence zone takes place due to

Answer

Destructive interference

Answer

Constructive interference

Question 24

24. 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 25

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

Question 26

26. Velocity of sound in vacuum is

Question 27

27. 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 28

28. 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 29

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

Answer

Same as that of the individual waves

Answer

√2 that of the individual waves

Answer

Half that of the individual waves

Answer

Twice that of the individual waves

Question 30

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

Answer

The energy is redistributed and the distribution remains constant with time

Answer

The energy is redistributed and the distribution changes with time

Answer

There is a loss of energy

Answer

There is a gain of energy

Question 31

31. In stationary waves

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

Answer

Alternating maximum and minimum energy producing at nodes and antinodes

Question 32

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

Question 33

33. The distance between node and anti-node is

Question 34

34. Beats are the results of

Answer

Polarization

Answer

Constrictive and destructive interference

Answer

Destructive interference

Answer

Diffraction of sound waves

Question 35

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

Answer

Becomes zero

Answer

Remains unchanged

Question 36

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

Answer

Wavelength

Answer

None of these

Question 37

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

Answer

Independent of x

Question 38

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

Answer

None of these

Answer

Oscillation

Question 39

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

Question 40

40. 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

√6 times slower

Answer

At correct rate

Question 41

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

Answer

Energy, momentum and mass

Answer

Energy and mass

Answer

Energy and linear momentum

Question 42

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

Answer

Becomes double

Answer

Remains same

Answer

Become one fourth

Answer

Becomes one half

Question 43

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

Answer

Applied periodic force is small

Answer

Damping force is small

Answer

Quality factor is small

Answer

Restoring force is small

Question 44

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

Answer

An ellipse

Answer

A straight line

Answer

A hyperbola

Question 45

45. The velocity of sound is greatest in

Question 46

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

Answer

Interference

Answer

Doppler effect

Answer

Beat phenomenon

Question 47

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

Answer

None of these

Answer

Progressive wave

Answer

Transverse wave

Answer

Longitudinal waves

Question 48

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

Answer

Rectilinear Motion

Answer

Simple Harmonic Motion

Answer

Circular Motion

Answer

Angular Motion

Question 49

49. The Doppler effect is produced if

Answer

None of these

Answer

The source is in motion

Answer

Both the above

Answer

The detector is in motion

Question 50

50. Doppler-effect applies to

Answer

Sound wave only

Answer

Both sound and light waves

Answer

Neither sound nor light wave

Answer

Light wave only

Question 51

51. The distance between node and antinode is

Question 52

52. Energy is not carried by

Answer

Stationary waves

Answer

Longitudinal vibration

Answer

Transverse progressive waves

Answer

Electromagnetic waves

Question 53

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

Answer

Time period

Answer

Reverberation

Answer

Oscillation Time

Question 54

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

Answer

Polarization

Answer

Refraction

Answer

Diffraction

Answer

Reflection

Question 55

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

Answer

Remains same

Answer

Increases or decreases depending on the material

Question 56

56. 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 57

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

Question 58

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

Question 59

59. 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

5α – 4β

Answer

9 (β – α)

Answer

5 β – 4 α

Question 60

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

Answer

The atmospheric pressure

Answer

Temperature of air

Answer

Moisture contents in air

Answer

The composition of air

Question 61

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

Answer

Supersonic speed

Answer

Sonic speed

Answer

None of these

Answer

Extra supersonic speed

Question 62

62. In stationary waves

Answer

Energy is minimum at nodes and maximum at antinodes

Answer

Alternating maximum and minimum energy producing at nodes and antinodes

Answer

Energy is minimum at nodes and maximum at antidotes

Answer

Energy is uniformly distributed

Question 63

63. The gases have a

Answer

Large elastic modulus

Answer

None of these

Answer

Smaller elastic modules

Answer

Zero elastic modulus

Question 64

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

Answer

Intensity and velocity

Answer

Frequency and velocity

Answer

Intensity and frequency

Answer

Frequency and number of harmonic

Answer 161

Transverse progressive

Answer 162

Longitudinal stationary

Answer 163

Transverse stationary

Answer 164

Longitudinal progressive

Answer 165

Polarization

Answer 166

Diffraction

Answer 167

Refraction

Answer 168

Interference

Answer 169

None of these

Answer 170

Become zero

Answer 171

Remains same

Answer 172

Reproduction of original image

Answer 173

Reproduction of music

Answer 174

Reproduction of original sound

Answer 175

Reproduction of a CD from original copy

Answer 176

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

Answer 177

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

Answer 178

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

Answer 179

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

Answer 180

Phase difference

Answer 181

Wave length

Answer 182

Frequency harmonic oscillator

Answer 183

Driven harmonic oscillator

Answer 184

Vibration harmonic oscillator

Answer 185

Mechanical waves

Answer 186

Carrier waves

Answer 187

Electromagnetic waves

Answer 188

Matter waves

Answer 189

Wave mechanics

Answer 190

Intensity of light

Answer 191

Energy of radiation

Answer 192

x-ray radiation capacity

Answer 193

Sound loudness

Answer 194

Cannot be diffracted

Answer 195

Do not affect photographic plate

Answer 196

Cannot be polarized

Answer 197

Have a lower frequency

Answer 198

Quadruple the mass

Answer 199

Reduce the mass to one fourth

Answer 200

Double the mass

Answer 201

Half the mass

Answer 202

Wavelength of sound

Answer 203

Density and elasticity of gas

Answer 204

Amplitude and frequency of sound

Answer 205

Different frequencies

Answer 206

Different frequencies and same phase

Answer 207

Different frequencies and same amplitude

Answer 208

Different frequencies, same amplitude and same phase

Answer 209

Independent of amplitude of motion

Answer 210

Amplitude of motion will be every small

Answer 211

Amplitude of motion will be very large

Answer 212

None of these

Answer 213

Sometimes in phase

Answer 214

Out of phase

Answer 215

None of these

Answer 216

Remain unaffected

Answer 217

Become infinite

Answer 218

(k₁+k₂)/2

Answer 219

k₁ k₂/( k₁+k₂)

Answer 220

√k₁k₂

Answer 221

Increased rapidly

Answer 222

None of these

Answer 223

3,000 to 6,000 Hz

Answer 224

4,000 to 8,000 Hz

Answer 225

5,000 to 11,000 Hz

Answer 226

2,000 to 4,000 Hz

Answer 227

Total Energy

Answer 228

Angular Momentum

Answer 229

K.E. Energy

Answer 230

P.E. Energy

Answer 231

Electromagnetic

Answer 232

Stationary

Answer 233

Longitudinal

Answer 234

Transverse

Answer 235

Hyperbolic

Answer 236

Logarithmic

Answer 237

Exponential

Answer 238

Sound waves

Answer 239

Light waves

Answer 240

All of these

Answer 241

Water waves

Answer 242

Polarization

Answer 243

Reflection

Answer 244

Refraction

Answer 245

Interference

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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