Sounds Waves And Motion MCQ

Test your knowledge with important Sounds Waves And Motion MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Sounds Waves And Motion MCQs at Bissoy

• Statement I The pitch of sound wave depends upon its frequency.<br>Statement II The loudness of the sound wave depends upon its amplitude.
  ক

  Both the statements are true and statement II is the correct explanation of statement I

  খ

  Both the statements are true, but statement II is not the correct explanation of statement I

  গ

  Statement I is true, but statement II is false

  ঘ

  Statement I is false, but statement II is true
• Visible radiation was discovered by:
  ক

  Henri Becquerel

  খ

  Wilhelm Rontgen

  গ

  Isaac Newton

  ঘ

  Guglielmo Marconi
• Echoes may be heard more than once due to successive or multiple:
  ক

  rarefaction

  খ

  reflection

  গ

  diffraction

  ঘ

  refraction
• If Va, Vw and Vs respectively are the speed of sound in air, water and steel, then
  ক

  [ <p><span>A. Va <p><span>B. VS

  খ

  VW

  গ

  VS
• The frequency (in Hz) of a note that is one octave higher than 500 Hz is
  ক

  375

  খ

  750

  গ

  1000

  ঘ

  2000
• SONAR is based on the principle of
  ক

  resonance

  খ

  reveberation

  গ

  echo

  ঘ

  None of the above
• A person rings, a metallic bell near a strong concrete wall. He hears the echo after 0.3 s. If the sound moves with a speed of 340 m/s, how far is the wall from him?
  ক

  102 m

  খ

  11 m

  গ

  51 m

  ঘ

  30 m
• The sound wave travels at a speed of 339 m/s^-1. If its wavelength is 1.5 cm, what will be the frequency of the wave?
  ক

  226 Hz

  খ

  2260 Hz

  গ

  226000 Hz

  ঘ

  22600 Hz
• When the speed of an object exceeds to the speed of sound, it is said to travel at . . . . . . . . speed.
  ক

  Subsonic

  খ

  Ultrasonic

  গ

  Super sonic

  ঘ

  sonic
• An echo comes back in 3 seconds. If the speed of sound is 342 ms^-1, what is the distance from the source to the reflecting surface?
  ক

  513 meters

  খ

  644 meters

  গ

  342 meters

  ঘ

  171 meters
• If the frequency of a sound wave is 50 hertz, find its time period.
  ক

  0.05 second

  খ

  0.02 second

  গ

  0.5 second

  ঘ

  0.2 second
• When a stone is dropped on the surface of still water, the waves produced are
  ক

  longitudinal

  খ

  transverse

  গ

  stationary

  ঘ

  partly transverse and partly longitudinal
• Sound wave in air is
  ক

  transverse

  খ

  longitudinal

  গ

  electromagnetic

  ঘ

  polarised
• Which type of sound waves can propagate in solids?
  ক

  Longitudinal only

  খ

  Transverse only

  গ

  Either longitudinal or transverse

  ঘ

  Non mechanical waves only
• Which of the following statements are true/false about the speed of sound in different mediums at 25°C?<br>A. In seawater, the speed of sound is 1531 km/s.<br>B. In water (distilled), the speed of sound is 1498 km/s.
  ক

  Neither A nor B is correct

  খ

  Both A and B are correct

  গ

  Only B is correct

  ঘ

  Only A is correct
• How much should minimum distance be between the source of sound and reflecting surface, so that an echo can be heard clearly?
  ক

  10 metre

  খ

  17 metre

  গ

  24 metre

  ঘ

  30 metre
• If T is the time period of an oscillating pendulum, then which one of the following statement is not correct?
  ক

  The motion repeats after time T only once

  খ

  T is the least time after which motion repeats itself

  গ

  The motion repeats itself after nT, where n is a positive integer

  ঘ

  T remains the same only for small angular displacements
• What is the approximate speed of sound in distilled water at 25°C (77°F)?
  ক

  1598 m/s

  খ

  1285 m/s

  গ

  1498 m/s

  ঘ

  3980 m/s
• Which of the following are electromagnetic waves?
  ক

  Alpha rays

  খ

  Audible waves

  গ

  X-ray

  ঘ

  β-rays
• The way the brain interprets the frequency of an emitted sound is called the . . . . . . . .
  ক

  Amplitude

  খ

  Sound

  গ

  Pitch

  ঘ

  Wave
• Which of the following is/are true regarding speed of sound in different mediums at 25°C?<br>A. In aluminium, the speed of sound is 6220m/s.<br>B. In nickel, the speed of sound is 6040 m/s.
  ক

  Both A and B are true

  খ

  Neither A nor B is true

  গ

  Only B is true

  ঘ

  Only A is true
• The frequency which is not audible to the human ear is:
  ক

  18000Hz

  খ

  22000Hz

  গ

  100Hz

  ঘ

  2000Hz
• Consider the following statements about ultrasonic waves.<br>1. They can destroy insects.<br>2. They can clean clothes by removing dust.<br>3. They can be used to treat diseases.<br>4. They can control automatic doors.<br>Of the above statements.
  ক

  1 and 2 are correct

  খ

  3 and 4 are correct

  গ

  1, 2 and 3 are correct

  ঘ

  All are correct
• The walls of the ball, built for music concerts should
  ক

  Amplify sound

  খ

  Transmit sound

  গ

  Reflect sound

  ঘ

  Absorb sound
• Ultrasonic waves are produced by making use of
  ক

  ferromagnetic material

  খ

  ferrimagnetic material

  গ

  piezoelectric material

  ঘ

  pyroelectrical material
• What is the approximate minimum distance between source and reflector for echo?
  ক

  36 m

  খ

  36 m

  গ

  17 m

  ঘ

  10 m
• If the frequency of a wave is doubled then its wavelength will be-
  ক

  3 times the original

  খ

  2 times the original

  গ

  One third of original

  ঘ

  Half of original
• In which type of waves do vibrations move parallel to the direction of the wave's movement?
  ক

  Transverse

  খ

  Microwave

  গ

  Longitudinal

  ঘ

  Superficial
• The optimum sound level for human beings is
  ক

  90 dB

  খ

  60 dB

  গ

  120 dB

  ঘ

  100 dB
• An astronaut cannot hear his companion ar the surface of the Moon because
  ক

  Produced frequencies are above the audio frequency

  খ

  Temperature is too low during night and too high during day

  গ

  There is no medium for sound propagation

  ঘ

  There are many craters on the surface of the Moon