Tag: vibrations in a tuning fork

Questions Related to vibrations in a tuning fork

Sound waves in air are

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

  1. transverse

  2. longitudinal

  3. electromagnetic

  4. polarised

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Correct Option: B
Explanation:

Sound waves are longitudinal waves because the disturbance of the medium particles is parallel to the direction of propagation of wave. The compression and rarefraction pulses produced moves in the direction parallel to the propagation direction of wave.

A tuning fork is excited by striking it with a padded hammer. What would be the nature of the vibrations executed by the prongs as well as the stem of the fork respectively ? (The reference direction is that of the propagation of the sound wave.)

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

  1. Both vibrate longitudinally

  2. Both vibrate transversely

  3. The prong vibrate longitudinally whereas the stem vibrates transversely

  4. The prong vibrate transversely whereas the stem vibrates longitudinally

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Correct Option: C

The ratio of the velocity of body and velocity of sound is known as

physics propagation of sound waves sound as a wave of disturbance vibrations in a tuning fork vibrations in tuning fork

  1. laplace number

  2. positive number

  3. stable number

  4. mach number

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Correct Option: D
Explanation:

Definition of Mach Number is $Ma=\frac{V _{body}}{V _{\mbox{sound in that medium}}}$.
Option "D" is correct.

Sound wave are not polarized because:

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

  1. Their speed is less

  2. A medium is needed for their propagation

  3. These are longitudinal

  4. Their speed depends on temperature

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Correct Option: A
Explanation:
   Sound wave are not polarized because,their speed is less.So the option is A.

The ratio of the speed of a body to the speed of sound is called:

physics propagation of sound waves sound as a wave of disturbance vibrations in a tuning fork vibrations in tuning fork

  1. Mach number

  2. Doppler Ratio

  3. Sonic index

  4. Refractive index

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Correct Option: A
Explanation:

Mach number of a body is the ratio of its speed to that of local sound.
The local speed of sound, and thereby the Mach number, depends on the condition of the surrounding medium, in particular the temperature and pressure. The Mach number is primarily used to determine the approximation with which a flow can be treated as an incompressible flow. 

Which type of wave is produced in the stem of tuning fork?

physics vibrations of stretched strings sound as a wave of disturbance vibrations in a tuning fork vibrations in tuning fork

  1. transverse

  2. transverse stationary

  3. longitudinal

  4. longitudinal stationary

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Correct Option: C
Explanation:

When tuning fork is sounded by striking its one end on rubber pad then the prongs vibrate in and out and stem vibrate up and down. Hence, vibration of prongs are transverse and those of stem are longitudinal. 

Which of the following is the longitudinal wave?

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

  1. Sound waves

  2. Waves on plucked string

  3. Water waves

  4. Light waves

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Correct Option: A
Explanation:

In sound waves vibration of particle is along the propagation of wave So it is longitudinal and in other options all are transverse wave as vibration of particle is perpendicular to the propagation of wave.  

Consider the following statement:
(a) Sound waves are longitudinal in nature.
(b) Sound waves cannot travel through vacuum.
(c) Sound waves are produced by oscillating charged particles only.
(d) Sound waves are electromagnetic waves.
Which of the following statements are correct ?

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

  1. (a) and (b)

  2. (b) and (c)

  3. (a), (b) and (d)

  4. (a),(b),(c) and (d)

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Correct Option: A
Explanation:

Sound waves are longitudinal waves. It needs a medium to propagate. Sound waves are example of mechanical waves, not electromagnetic waves. Electromagnetic waves are created by the vibration of an electric charge.

A longitudinal waves consists of

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

  1. crest and troughs in the medium

  2. compressions and rarefactions in the medium

  3. crest and troughs in vacuum 

  4. Both A and B

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Correct Option: B
Explanation:

Longitudinal waves, also known as l-waves, are waves in which the displacement of the medium is in the same direction as, or the opposite direction to, the direction of travel of the wave. Longitudinal waves are also called compression waves or compression waves, because they produce compression and rarefaction when traveling through a medium.  In longitudinal waves, the displacement of the particle's is parallel to the propagation of the wave. 

In case of longitudinal waves, the particles of medium vibrate

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

  1. in the direction of wave propagation

  2. opposite to the direction of wave propagation

  3. at right angles to the direction of wave propagation

  4. none of the above

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Correct Option: A
Explanation:

Longitudinal waves, also known as l-waves, are waves in which the displacement of the medium is in the same direction as the direction of travel of the wave. Longitudinal waves are also called compressional waves or compression waves, because they produce compression and rarefaction when traveling through a medium.