Tag: longitudinal and transverse waves

Questions Related to longitudinal and transverse waves

Transverse mechanical wave can travel in

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. Iron rod

  2. Hydrogen gas

  3. Water surface

  4. Stretched string

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Correct Option: A,C,D
Explanation:

Transverse waves can travel only in solids and only along the surface of liquids, but not in the entire liquid. They can't travel in gases.

Since iron rod and stretched string are solids, transverse waves can travel in them.
Water surface being a liquid surface they can travel in it also.
Hydrogen gas being a gas, they can't travel in it.

Which of the following can travel through vacuum?

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. Light waves

  2. Heat waves

  3. $X$-rays

  4. Sound waves

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Correct Option: A,B,C
Explanation:

Heat rays are infra-red rays.

Light rays, infra-red rays and X-rays are all electromagnetic rays.
Electromagnetic rays can travel through vacuum and through transperent media.
However, sound waves are mechanical longitudinal waves. They need a material medium for travelling. They can't travel through vacuum.

Which of the following does not identify a necessary property of wave motion?

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. transmission of energy

  2. periodic motion

  3. disturbance

  4. a material medium

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Correct Option: D
Explanation:

In any wave motion, energy is always transferred to the next particle which is succeeding the previous particle.  In a wave motion, particles are oscillating in a direction perpendicular to the direction of propagation or parallel. Since oscillation is a periodic motion,  we can say that periodic motion is always associated with the wave.  An oscillatory disturbance is always imparted the next and next particle and this is how the disturbance Travels across the particles.  Ordinary waves require a material medium for propagation. But electromagnetic waves do not require any material medium. They can also propagate through vacuum. Thus material medium is not a necessary condition for all wave motions.

During propagation of a plane progressive mechanical wave :

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. all the particles are vibrating in the same phase

  2. amplitude of all the particles is equal

  3. particles of the medium execute S.H.M.

  4. wave velocity depends upon the nature of the medium

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Correct Option: B,C,D
Explanation:

During propagation of a plane progressive mechanical wave amplitude of all the particles is equal, particle of the medium execute S.H.M, wave velocity depends upon the nature of the medium and all the particles are vibrating in the different phase.

Hence $B, C$ and $D$ are correct options.

Distance between crest and through is

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. $\displaystyle \frac{\lambda}{4}$

  2. $\displaystyle \frac{2\lambda}{6}$

  3. $\displaystyle \frac{\lambda}{2}$

  4. $\displaystyle \frac{2\lambda}{3}$

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Correct Option: C

A point on the wave, wherein the displacement of the wave is ___________ is known as a crest

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. Maximum

  2. Minimum

  3. Zero

  4. None of the above

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Correct Option: A
Explanation:

A crest is a point on the wave where the displacement of the medium is at a maximum

The correct option is (a)

A string tied to a wall is given a flip at the other end with an initial velocity u, which generates a curve. After sometime, this curve is seen to reach the wall with the same speed. The transfer of the kinetic energy takes place due to

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. air molecules surrounding the string

  2. sound wave carried by the string

  3. molecules on the string

  4. none of the above

Show answer
Correct Option: C
Explanation:

For the wave to propogate, it needs a mechanical medium and this uses the molecules of string to propogate the energy


The correct option is (c)

A heat energy of 540 kJ ,given to 1 litre of water at 100C makes the water to boil. In this process, heat energy is transferred from the source to water by means of 

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. water

  2. steam

  3. air

  4. none of the above

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Correct Option: A
Explanation:

Water acts as a medium to transfer heat energy from the source

The correct option is (a)

A metal hammer hits a spherical bell, when the circuit in a calling bell is switched ON, the propogation of sound takes place due to 

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. Air

  2. electric current

  3. metal bell

  4. none of the above

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Correct Option: A
Explanation:

Though the hammer strikes the bell and the bell starts vibrating, these vibrations are then carried out to the atmosphere only by air molecules thereby creating a sound

The correct option is (a)

Waves that are combination of longitudinal and transverse nature are

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. water waves

  2. light waves

  3. shock waves

  4. sound waves

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Correct Option: A
Explanation:

Water waves are an example of waves that involve a combination of both longitudinal and transverse motions. As a wave travels through the waver, the particles travel in clockwise circles. The radius of the circles decreases as the depth into the water increases. The animation at right shows a water wave travelling from left to right in a region where the depth of the water is greater than the wavelength of the waves. I have identified two particles in orange to show that each particle indeed travels in a clockwise circle as the wave passes.