Tag: sound as a wave of disturbance

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Multiple choice physics study of sound sound as a wave of disturbance vibrations in a tuning fork vibrations in tuning fork

The waves in which the particles of the medium vibrate in a direction perpendicular to the direction of wave motion is known as:

  1. transverse wave

  2. propagated waves

  3. longitudinal waves

  4. stationary waves
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The waves in which the particles of the medium vibrate in a direction perpendicular to the direction of wave motion is known as transverse wave. Examples of these waves are: vibrations in strings, ripples on water surface and electromagnetic waves.

Multiple choice physics study of sound sound as a wave of disturbance vibrations in a tuning fork vibrations in tuning fork

Compressions and rarefactions are seen in

  1. longitudinal and transverse waves

  2. longitudinal waves only

  3. transverse waves only

  4. none
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

   Longitudinal waves propagate in a medium in the form of compressions and rarefactions . When pressure becomes high , medium particles come closer and a compression is formed and due to low pressure , rarefaction is formed .

  Transverse waves propagate in the form of crests and troughs .

Multiple choice physics study of sound sound as a wave of disturbance vibrations in a tuning fork vibrations in tuning fork

Sound is called longitudinal wave because

  1. sound need a material medium for propagation

  2. the molecules of the medium oscillate to and fro about their mean position in the direction of propagation

  3. sound waves moves in the direction of its production

  4. all reasons are correct
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When a sound travels through their medium, the molecules in the air oscillate to and fro about their mean positions in the direction of propagation of sound wave.

Multiple choice physics study of sound sound as a wave of disturbance vibrations in a tuning fork vibrations in tuning fork

Compressions and rarefactions are seen in :

  1. longitudinal and transverse waves

  2. longitudinal waves only

  3. transverse waves only

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In case of longitudinal waves compressions and rarefactions are seen. Compressions are the regions of high density and rarefactions are regions of low density.In transverse waves generally crest and troughs are seen.

Multiple choice physics study of sound sound as a wave of disturbance vibrations in a tuning fork vibrations in tuning fork

When sound travels through air, the air particles :

  1. vibrate along the direction of wave propagation

  2. vibrate but not in any fixed direction

  3. vibrate perpendicular to the direction of wave propagation

  4. do not vibrate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sound is a longitudinal wave.  If the particles of a medium vibrate or oscillate to and fro about their equilibrium position along the direction of propagation of disturbance then the wave is called longitudinal wave.

Multiple choice physics study of sound sound as a wave of disturbance vibrations in a tuning fork vibrations in tuning fork

How longitudinal waves are different from other waves?

  1. Particles of medium move in a direction parallel to direction of energy transport

  2. Particles of medium move in a direction perpendicular to direction of energy transport

  3. Particles of medium move in a direction below to direction of energy transport

  4. None
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Longitudinal waves are different from the others waves because in longitudinal waves particles of medium move in a direction parallel to direction of energy transport for longitudinal waves.

Multiple choice physics study of sound sound as a wave of disturbance vibrations in a tuning fork vibrations in tuning fork

In a graphical presentation of longitudinal waves as attached, the peak of wave is called

  1. Compression

  2. Rarefaction

  3. Reflection

  4. Refraction
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Graphical representation of longitudinal waves is the variation of pressure (y-axis) with the distance (x-axis). We know that, the pressure is higher at the point where the element of medium is compressed and the pressure is low where the element of medium is rarefied.
So, the wave forms a pressure peak at compression and pressure valley at rarefaction.