Tag: vibrations in a tuning fork

Questions Related to vibrations in a 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:

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

  1. transverse wave

  2. propagated waves

  3. longitudinal waves

  4. stationary waves

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Correct Option: A
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.

Compressions and rarefactions are seen in

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

  1. longitudinal and transverse waves

  2. longitudinal waves only

  3. transverse waves only

  4. none

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Correct Option: B
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 .

Sound is called longitudinal wave because

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

  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

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Correct Option: B
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.

Compressions and rarefactions are seen in :

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

  1. longitudinal and transverse waves

  2. longitudinal waves only

  3. transverse waves only

  4. none of these

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Correct Option: B
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.

When vibrating string moves in reverse direction then

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

  1. it lowers pressure to right

  2. it lowers pressure to left

  3. it lowers pressure to center

  4. it increases pressure to right

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Correct Option: A
Explanation:

When vibrating string moves in a reverse direction, the pressure due to the vibrant molecules lowers to right.

When sound travels through air, the air particles :

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

  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

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Correct Option: A
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.

How does sound from a sound producing body travel through air to reach our ears?

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

  1. through crest and troughs

  2. through compression and rarefaction

  3. both

  4. none

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Correct Option: B
Explanation:

Sound from a sound producing body travel through air to reach our ears by making regular compression and rarefaction.

How longitudinal waves are different from other waves?

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

  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

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Correct Option: A
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.

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

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

  1. Compression

  2. Rarefaction

  3. Reflection

  4. Refraction

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Correct Option: A
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.

Sound is a good example of

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

  1. Transverse Waves

  2. Longitudinal Waves

  3. Both

  4. None

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Correct Option: B
Explanation:

Sound waves are longitudinal waves which require a material medium (solid, liquid or gas) to propagate. So, sound waves cannot pass through a perfect vacuum.