Physics Waves Online Mcqs Test

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Question 1

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

Answer

Interference

Answer

Polarization

Answer

Refraction

Answer

Reflection

Question 2

2. 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

5 β – 4 α

Answer

9 (β – α)

Question 3

3. Decibel is unit of

Answer

Sound loudness

Answer

Energy of radiation

Answer

x-ray radiation capacity

Answer

Intensity of light

Question 4

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

Question 5

5. 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

Answer

Different frequencies and same phase

Question 6

6. In stationary waves

Answer

Energy is minimum at nodes and maximum at antinodes

Answer

Energy is minimum at nodes and maximum at antidotes

Answer

Energy is uniformly distributed

Answer

Alternating maximum and minimum energy producing at nodes and antinodes

Question 7

7. Energy is not carried by

Answer

Longitudinal vibration

Answer

Electromagnetic waves

Answer

Transverse progressive waves

Answer

Stationary waves

Question 8

8. 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 9

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

Answer

Wave length

Answer

Phase difference

Question 10

10. 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 11

11. The velocity of sound is greatest in

Question 12

12. 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 13

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

Question 14

14. 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 15

15. The velocity of sound in air depends upon

Answer

Wavelength of sound

Answer

Amplitude and frequency of sound

Answer

Density and elasticity of gas

Question 16

16. Sound waves do not travel in vacuum because

Answer

They are transverse waves

Answer

They require material medium for propagation

Answer

They do not have enough energy

Answer

They are stationary waves

Question 17

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

Answer

Intensity and velocity

Answer

Frequency and number of harmonic

Answer

Intensity and frequency

Answer

Frequency and velocity

Question 18

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

Answer

Logarithmic

Answer

Exponential

Answer

Hyperbolic

Question 19

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

Answer

The composition of air

Answer

Moisture contents in air

Answer

Temperature of air

Answer

The atmospheric pressure

Question 20

20. Beats are the results of

Answer

Diffraction of sound waves

Answer

Constrictive and destructive interference

Answer

Destructive interference

Answer

Polarization

Question 21

21. The distance between node and antinode is

Question 22

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

Question 23

23. 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 increase

Answer

Time period will not change

Answer

Time period will decrease

Answer

Time period will depend on the weight of the boy.

Question 24

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

Question 25

25. Silence zone takes place due to

Answer

Destructive interference

Answer

Constructive interference

Question 26

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

Answer

Half that of the individual waves

Answer

Same as that of the individual waves

Answer

Twice that of the individual waves

Answer

√2 that of the individual waves

Question 27

27. 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 28

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

Question 29

29. Doppler-effect applies to

Answer

Sound wave only

Answer

Light wave only

Answer

Both sound and light waves

Answer

Neither sound nor light wave

Question 30

30. 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 31

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

Answer

None of these

Answer

Increased rapidly

Question 32

32. 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 and mass

Answer

Energy, momentum and mass

Question 33

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

Answer

No apparent change in frequency

Answer

An apparent increase in frequency

Answer

An apparent decrease in wavelength

Answer

An apparent decrease in frequency

Question 34

34. The gases have a

Answer

Smaller elastic modules

Answer

Large elastic modulus

Answer

Zero elastic modulus

Answer

None of these

Question 35

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

Answer

None of these

Answer

Wavelength

Question 36

36. Velocity of sound in vacuum is

Question 37

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

Answer

Becomes zero

Answer

Remains unchanged

Question 38

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

Answer

Matter waves

Answer

Mechanical waves

Answer

Electromagnetic waves

Answer

Carrier waves

Question 39

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

Answer

Reverberation

Answer

Oscillation Time

Answer

Time period

Question 40

40. A system under going force vibrations is known as

Answer

Frequency harmonic oscillator

Answer

Driven harmonic oscillator

Answer

Vibration harmonic oscillator

Question 41

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

Answer

Beats phenomena

Answer

Interference of waves

Answer

Doppler effect

Answer

All of these

Question 42

42. 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

Can penetrate the wall

Answer

Has a definite capacity

Answer

Has a definite quality

Question 43

43. The Doppler effect is produced if

Answer

Both the above

Answer

The source is in motion

Answer

The detector is in motion

Answer

None of these

Question 44

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

Answer

1/T seconds

Answer

1/f seconds

Question 45

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

Question 46

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

Answer

Independent of x

Question 47

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

Answer

Diffraction

Answer

Interference

Answer

Refraction

Answer

Polarization

Question 48

48. In stationary waves

Answer

Alternating maximum and minimum energy producing at nodes and antinodes

Answer

Energy is uniformly distributed

Answer

Energy is maximum at nodes and minimum at antidotes

Answer

Energy is minimum at nodes and maximum at antinodes

Question 49

49. 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 50

50. In vibratory motion which parameter remains constant?

Answer

K.E. Energy

Answer

Total Energy

Answer

Angular Momentum

Answer

P.E. Energy

Question 51

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

Answer

Beat phenomenon

Answer

Interference

Answer

Doppler effect

Question 52

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

Answer

Remains same

Answer

Increases or decreases depending on the material

Question 53

53. 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 54

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

Answer

Out of phase

Answer

None of these

Answer

Sometimes in phase

Question 55

55. 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 56

56. 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 57

57. In simple harmonic motion,

Answer

The velocity and displacement 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 acceleration 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 58

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

Answer

Wave mechanics

Question 59

59. 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 60

60. The distance between node and anti-node is

Question 61

61. 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/( k₁+k₂)

Answer

(k₁+k₂)/2

Answer

√k₁k₂

Question 62

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

Answer

Cannot be polarized

Answer

Do not affect photographic plate

Answer

Cannot be diffracted

Answer

Have a lower frequency

Question 63

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

Answer

Oscillation

Answer

None of these

Question 64

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

Answer

Visible light

Answer

Infra-red radiation

Answer

Ultra-violet rays

Answer

Gamma rays

Answer 168

Remain unaffected

Answer 169

Become infinite

Answer 170

Sound waves

Answer 171

All of these

Answer 172

Light waves

Answer 173

Water waves

Answer 174

Remains same

Answer 175

Becomes one half

Answer 176

Become one fourth

Answer 177

Becomes double

Answer 178

Double the mass

Answer 179

Reduce the mass to one fourth

Answer 180

Quadruple the mass

Answer 181

Half the mass

Answer 182

Stationary

Answer 183

Transverse

Answer 184

Longitudinal

Answer 185

Electromagnetic

Answer 186

Becomes Zero

Answer 187

Remains constant

Answer 188

There is a loss of energy

Answer 189

The energy is redistributed and the distribution remains constant with time

Answer 190

The energy is redistributed and the distribution changes with time

Answer 191

There is a gain of energy

Answer 192

4π second

Answer 193

2π second

Answer 194

Amplitude of motion will be very large

Answer 195

None of these

Answer 196

Amplitude of motion will be every small

Answer 197

Independent of amplitude of motion

Answer 198

An ellipse

Answer 199

A hyperbola

Answer 200

A straight line

Answer 201

Longitudinal stationary

Answer 202

Transverse stationary

Answer 203

Transverse progressive

Answer 204

Longitudinal progressive

Answer 205

Neither pressure nor density

Answer 206

Pressure only

Answer 207

Both pressure and density

Answer 208

Density only

Answer 209

None of these

Answer 210

100 Nm¯¹

Answer 211

143 Nm¯¹

Answer 212

700 Nm¯¹

Answer 213

300 Nm¯¹

Answer 214

Damping force is small

Answer 215

Restoring force is small

Answer 216

Quality factor is small

Answer 217

Applied periodic force is small

Answer 218

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

Answer 219

When v is maximum, α is zero

Answer 220

When v is zero, α is zero

Answer 221

When v is maximum, α is maximum

Answer 222

Mechanical waves

Answer 223

Periodic waves

Answer 224

Progressive waves

Answer 225

None of these

Answer 226

Neither the elastic property nor the inertia property

Answer 227

The elastic property but not on the inertia property

Answer 228

The elastic property as well as the inertia property

Answer 229

The inertia property but not on the elastic property

Answer 230

Sonic speed

Answer 231

Supersonic speed

Answer 232

None of these

Answer 233

Extra supersonic speed

Answer 234

Refraction

Answer 235

Polarization

Answer 236

Diffraction

Answer 237

Reflection

Answer 238

Rectilinear Motion

Answer 239

Simple Harmonic Motion

Answer 240

Angular Motion

Answer 241

Circular Motion

Answer 242

1483 ms¯¹

Answer 243

1567 ms¯¹

Answer 244

1214 ms¯¹

Answer 245

1343 ms¯¹

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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