Tag: physics

Questions Related to physics

Wavelength is expressed in:

physics sound sound produced by humans propagation of sound production and propagation of sound

  1. $N$

  2. $erg$

  3. $dyne$

  4. $A^0$

Show answer
Correct Option: D
Explanation:

Wavelength, being a quantity of dimension of length, is expressed in $A^0$, i.e., angstroms.

$1\ A^0=10^{-10}\ m$

The voices of men, women and children are different due to difference in:

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. larynx

  2. lungs

  3. vocal coards

  4. wind pipe

Show answer
Correct Option: C
Explanation:

Larynx is responsible for production of sound , and vocal chords are placed inside the larynx , which are responsible for shrill and grave sound , that makes the sound of a lady shrill and of a man , grave .

Lungs filters the oxygen from air .
Wind pipe is the path of air towards the lungs .

Vocal cords in men are about ____ long.

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. 20 mm

  2. 20 cm

  3. 20 m 

  4. 15 cm 

Show answer
Correct Option: A
Explanation:

The vocal cords in men are of 20 mm long. 

State whether true or false.
The other name for the voice box in humans is Larynx.

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Larynx is the portion of the respiratory tract containing the vocal cords which produce sound. It is located between the pharynx and the trachea. The larynx is also called as the voice box.

What is the name of the strings which vibrate in our voice box when we talk?

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. oesophagus

  2. pharyngeal slits

  3. vocal cords

  4. all

Show answer
Correct Option: C
Explanation:

The name of the strings which vibrate in our voice box when we talk is vocal cords. These are two bands of elastic tissue located side by side in the voice box (larynx) just above the trachea.

The sound of the human voice is produced due to

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. movement of tongue

  2. vibration in the pharynx

  3. vibration in the vocal cord

  4. vibration below tongue

Show answer
Correct Option: C
Explanation:

Vibration means rapid to and fro movement of an object. Sound of the human voice is produced due to vibrations in the vocal cords.

State whether given statement is True or False
In humans, sound is produced because of the vibration of the larynx.

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

The larynx is located at the upper end of the windpipe. The vocal chords attached to the larynx, stretch it to create a passage for air. When air passes through this passage, the vocal chords vibrate and produce sound.

On what does the quality of voice depend ?

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. Thickness of vocal chords

  2. Length of local chords

  3. Stiffness of vocal chords

  4. All of these

Show answer
Correct Option: D
Explanation:

The quality of voice depends on the length, thickness and stiffness of the vocal chords. Tight, thin and short vocal chords produce high pitched voice like that of females. Loose, thick and long vocal chords produce low - pitched voice like that of men.

Muscles attached to the vocal cords can make them

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. tight only

  2. loose only

  3. both loose and tight as per requirement

  4. neither loose nor tight

Show answer
Correct Option: C
Explanation:

The muscles attached to the vocal cords can expand and contract, thus making them tight and loose. The voice quality changes depending on whether the vocal cords are tight or loose.

Where is the voice box located in the body ?

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. At the upper end of the windpipe

  2. At the upper end of the lungs

  3. At the lower end of the windpipe

  4. In between the oesophagus

Show answer
Correct Option: A
Explanation:

The larynx or the voice box is located at the upper end of the windpipe.