Tag: sound waves are longitudinal waves

Questions Related to sound waves are longitudinal waves

The waves in which the particles of the medium travel in the same direction as the waves are called :

physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

  1. linear waves

  2. longitudinal waves

  3. transverse waves

  4. electromagnetic waves

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Correct Option: B
Explanation:

The waves in which the particles of the medium travel in the same direction as the waves are called longitudinal waves. 

Example:sound waves, seismic waves.

Wave on water surface are

physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

  1. Longitudinal

  2. Transverse

  3. Combination of longitudinal and transverse.

  4. None of these

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Correct Option: C
Explanation:

$Answer:-$ C option

Ocean waves are both longitudinal and transverse. Technically, they're a special category called surface waves. 

At the surface of the water (or generally any place two fluids of different densities meet) the force of gravity acts as the "returning" force required for transverse waves to propagate. Gravity wants to level out the surface of the water, so peaks try to flatten and troughs try to fill. This is somewhat similar to the way a guitar string tries to return to a straight line after being plucked. 

However there is essentially zero shear strength in water, so pure transverse waves would die out extremely quickly. The trick comes from the fact that the water in an ocean wave does not move with the wave itself -- each bit of water can only give its neighbors a push, not flow. This push increases the local pressure in the water, which allows the wave to become deeper/higher.

If you could see the bulk pressure/motion of the water column below the surface, you would immediately see the fact that the "wave" is mostly a localized upswell caused by an actual submerged longitudinal pressure wave. Or you could say the upswell from the wave causes a submerged longitudinal pressure wave beneath it! Two ways to say the same thing. Dynamic fluid behavior is tricky like that. 

The waves produced by a motor boat sailing in water are

physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

  1. transverse

  2. longitudinal

  3. longitudinal and transverse

  4. stationary

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Correct Option: C
Explanation:

When a motor boat sails in water , waves will be produced on the surface of the water. We know that water waves are a combination of longitudinal and transverse waves as the particles move in a circular path.    

Energy is not carried by 

physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

  1. Transverse progressive waves

  2. Longitudinal progressive waves

  3. Stationary waves

  4. Electromagnetic waves

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Correct Option: C
Explanation:

$Answer:-$ C option

All the propagating waves (wave on string -transverse , sound-longitudinal)  carry energy with them and also electromagnetic waves like light carry energy.
Stationary waves do not carry energy with them because their energy is confined in that area (as they are not propagating).

Waves inside a gas are

physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

  1. Longitudinal

  2. Transverse

  3. Partly longitudinal, partly transverse.

  4. None of these

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Correct Option: A
Explanation:

$Answer:-$ A option

In fluids (liquids and gases), atoms have no "equilibrium location"; they can move freely past each other. So if one atom gets moved by a disturbance, there's no restoring force to pull it back to its equilibrium location,
hence transverse waves cannot travel through fluids.
so only longitudinal waves can travel in gases and liquids.

The moon is at a distance of $4\, \times\, 10^8\, m$ from the earth. What is the nature of radar signal transmitted from earth?

physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

  1. Remain fixed

  2. Vibrate to and fro about their mean position

  3. Move along the wave

  4. Change their positions permanently

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Correct Option: B
Explanation:

radar signal is a example of EM wave . so the signal will vibrate to and fro about mean position

so the answer is B.

The angle between particle velocity and wave velocity in a transverse wave is

physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

  1. zero

  2. $\pi /4$

  3. $\pi /2$

  4. $\pi$

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Correct Option: C
Explanation:

In a transverse wave, the displacement of the particle is perpendicular to the wave propagation. Thus, the angle between particle velocity and wave  velocity should be $\pi/2$.

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 types of waves sound as a wave of disturbance sound waves are longitudinal waves

  1. Longitudinal waves

  2. Propagated waves

  3. Transverse wave

  4. None of these

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Correct Option: C
Explanation:

Transverse waves have particles oscillating perpendicular to the direction of motion of wave. Ripple in the surface of water is transverse in nature

The waves which can propagate in metals are :

physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

  1. longitudinal waves

  2. transverse waves

  3. both (a) and (b)

  4. neither (a) nor (b)

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Correct Option: C
Explanation:

Propagation of waves depends on the medium through which they propagate. Transverse wave need a medium rigid enough which neither liquid nor gas can provide and hence transverse wave can travel through metals. For longitudinal wave they just require a medium for propagation. Hence transverse and longitudinal wave can both propagate in metals.

Wave in which particles of the medium oscillate to and from about their mean position is

physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

  1. Transverse wave

  2. Longitudinal wave

  3. Oscillatory wave

  4. None

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Correct Option: B
Explanation:

By definition a wave in which the particles of the medium oscillate to and fro about their mean positions in the direction of propagation is known as longitudinal wave. It can be produced in any medium.