Tag: world of sounds

Questions Related to world of sounds

By studying sound waves, we may come to know about its:

physics world of sounds characteristics of sound wave time period, frequency and amplitude of sound sound waves are longitudinal waves

  1. amplitude only

  2. frequency and wavelength Only

  3. amplitude, frequency and wavelength

  4. amplitude and wavelength only

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Correct Option: C
Explanation:

By studying sound waves, we may come to know about its amplitude, frequency and wavelength.

Which are the two properties that affect wave speed ?

physics world of sounds characteristics of sound wave time period, frequency and amplitude of sound sound waves are longitudinal waves

  1. Inertial properties and elastic properties

  2. Mass properties and elastic properties

  3. Inertial properties and bending properties

  4. Bending properties and elastic properties

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Correct Option: A
Explanation:

In a wave, particles are moving from one place to another and again come back to the same place due to inertial properties and due to elastic properties  the wave vibrates. 

The motion that is repeated at regular intervals is termed as

physics world of sounds characteristics of sound wave time period, frequency and amplitude of sound sound waves are longitudinal waves

  1. Vibration

  2. Ventilation

  3. Oscillation

  4. Periodic Motion

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Correct Option: D
Explanation:

Periodic Motion  is repeated at regular intervals

Which of the following is not a characteristics of mechanical waves? 

physics world of sounds characteristics of sound wave time period, frequency and amplitude of sound sound waves are longitudinal waves

  1. They consist of disturbances or oscillations of a medium 

  2. They transport energy.

  3. They travel in a direction that is at right angles to the direction of the particles of the medium. 

  4. They are created by vibrating source. 

Show answer
Correct Option: C
Explanation:

All of the above are the characteristics except mechanical waves travel in a direction that is at right angles to the direction of the particles of the medium. 

Find out the relationship between the frequency and amplitude of a sound wave?

physics world of sounds characteristics of sound wave time period, frequency and amplitude of sound sound waves are longitudinal waves

  1. Frequency is proportional to amplitude

  2. Frequency is proportional to the square of the amplitude

  3. Frequency is inversely proportional to amplitude

  4. Frequency is inversely proportional to the square of the amplitude

  5. Frequency and amplitude are independent

Show answer
Correct Option: E
Explanation:

Frequency of a wave is $f=1/T$ where T be the time period of the wave.

As time period does not depend on the amplitude so frequency is also independent of amplitude.  

Sound waves cannot travel in:

physics world of sounds characteristics of sound wave time period, frequency and amplitude of sound sound waves are longitudinal waves

  1. air

  2. metal

  3. vacuum

  4. water

  5. wood

Show answer
Correct Option: C
Explanation:

Sound waves are mechanical waves and we know from the properties of mechanical waves that they require medium to propagate , therefore sound waves cannot travel in vacuum.

Compressional wave among the following is?

physics world of sounds characteristics of sound wave time period, frequency and amplitude of sound sound waves are longitudinal waves

  1. X-ray

  2. Cosmic ray

  3. Radio wave

  4. Light wave

  5. Sound wave

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Correct Option: E
Explanation:

X-ray, cosmic ray, radio wave, light wave, they all  are electromagnetic waves and we know that an electromagnetic wave is always  a transverse wave, on the other hand sound wave is a mechanical longitudinal wave which propagates in a medium with compressions and rarefactions. Therefore, sound wave is a compressional wave among them.

Sound waves do not exhibit polarization because, unlike light waves, they are not:

physics world of sounds characteristics of sound wave time period, frequency and amplitude of sound sound waves are longitudinal waves

  1. longitudinal

  2. coherent

  3. dispersive

  4. transverse

  5. refractive

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Correct Option: D
Explanation:

In polarization the vibrations of electric vector of light are restricted by a polariser in a single plane  because vibrations are perpendicular to the propagation of light ,  as light is a transverse wave .
Polarization is the phenomenon of transverse waves only , it does not happen in longitudinal waves  , as sound waves are longitudinal waves in which vibrations are in the direction of propagation of wave so they pass the polariser without any change and doesn't experience any polarization . 

Which type of wave can be diffused by Acoustic diffusers?

physics world of sounds characteristics of sound wave time period, frequency and amplitude of sound sound waves are longitudinal waves

  1. sound waves

  2. light waves

  3. water waves

  4. microwaves

  5. ultraviolet rays

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Correct Option: A
Explanation:

Sound waves can be diffused by Acoustic diffusers but not the other given waves. 

Sound waves can diffract easily because

physics world of sounds characteristics of sound wave time period, frequency and amplitude of sound sound waves are longitudinal waves

  1. Their wavelength is very small

  2. Their wavelength is large

  3. It can reflect

  4. It can refract

Show answer
Correct Option: B
Explanation:

Having a very large wavelength made the waves to bend more, when they meet on obstacle.