Tag: sound as a wave of disturbance

Questions Related to sound as a wave of disturbance

State whether the given statement is True or False :

If a pebble is thrown into the water the ripples on the surface of water are created due to translatory motion of the water particles.

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

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

when the pebble is thrown in water the disturbance created travels in all outwards directions over the surface of the water in the form of ripples these ripples are circular in shape .

so the statement is false .
so answer is B.

When a tuning fork vibrates, the waves produced in the stem are:

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

  1. longitudinal

  2. transverse

  3. both (a) and (b)

  4. none of these

Show answer
Correct Option: A
Explanation:

When tuning fork is sounded by striking its one end 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. 

Hence Option A is correct

Transverse waves cannot travel through

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

  1. An iron rod

  2. Hydrogen gas

  3. A stretched nylon string

  4. Lubricating oil

Show answer
Correct Option: B
Explanation:

Transverse waves cannot propagate in a gas because there is no mechanism for driving motion perpendicular to the propagation of the wave.

so the answer is B.

Water waves are

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

  1. longitudinal

  2. transverse

  3. neither longitudinal nor transverse

  4. both longitudinal and transverse

Show answer
Correct Option: D
Explanation:

Water waves are both longitudinal and transverse. As a wave travels throught he water, the particles travel in clockwise circles. The radius of the circles decreases as the depth into the water.

Hence option (D) is correct.

When we pluck the wire of a sitar, the waves produced in the air are ___________.

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

  1. longitudinal

  2. transverse

  3. sometimes longitudinal and sometimes transverse

  4. electromagnetic

Show answer
Correct Option: B
Explanation:

When we pluck the wire of a sitar, the wave produced in the wire are transverse wave.

Hence option (B) is correct.

In a slinky

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

  1. Both transverse pulse as well as longitudinal pulse can be generated

  2. Both types of pulse cannot be generated

  3. Only a transverse pulse can be generated

  4. Only a longitudinal pulse can be generated

Show answer
Correct Option: A
Explanation:

Slinky is a dress which is tight-fitting, elastic and flexible. By fixing one end on a rigid support and holding the other end waves can be generated. By moving it back and forth, longitudinal waves can be generated. By moving up and down, transverse can be made.

Waves 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

Show answer
Correct Option: C
Explanation:

Water surface exhibits a combination of both longitudinal and transverse waves. When the wave travels through the water, the particles travel in a circular path, both parallel and perpendicular to the direction of wave propagation. 

When you speak to your friend, the quantity having a non unique value in the sound produced is

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

  1. amplitude

  2. wave velocity

  3. frequency

  4. wavelength

Show answer
Correct Option: B
Explanation:

Amplitude and frequency depend on source and as frequency is different, wavelength also has to be different to maintain same speed as speed is constant for a medium in a particular condition.

Which one of following is not a longitudinal wave?

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

  1. Ultrasonic wave

  2. Infrasonic wave

  3. Infrared wave

  4. Seismic wave

Show answer
Correct Option: C
Explanation:

Ultrasonic wave , Infrasonic wave and Seismic wave are longitudinal waves

Infrared wave is Transverse wave
Therefore Infrared wave is not a longitudinal wave
Therefore correct option is $C$

Velocity of a transverse wave along a stretched string is proportional to ___________. (T=tension in the string).

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

  1. $\sqrt{T}$

  2. $\displaystyle T$

  3. $\displaystyle\frac{1}{\sqrt T}$

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

Show answer
Correct Option: A
Explanation:

Velocity of transverse wave $v =\sqrt{\dfrac{T}{\mu}}$

where $T$ is the tension in the string and $\mu$ is the mass of string per unit its length.
$\implies$ $v \propto \sqrt{T}$