Tag: world of sounds

Questions Related to world of sounds

If we tighten the stretched strings of guitar, then pitch will be 

physics world of sounds sound is produced by a vibrating body propagation of sound production and propagation of sound

  1. lower

  2. higher

  3. same

  4. dependent upon size of instrument

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Correct Option: B
Explanation:

Pitch of sound depends on frequency. The frequency of sound emitted by a stretched string depends upon the tension on the string.  Greater tension means greater frequency, which means greater pitch. When we tighten the string of an instrument we are increasing the tension on the string. This increases the frequency. Hence pitch increases

Tuning fork causes them to vibrate and produce sound. This is due to 

physics world of sounds sound is produced by a vibrating body propagation of sound production and propagation of sound

  1. the two metal prongs of that tuning fork

  2. the length of the prongs of that tuning fork

  3. the speed of the molecules hit the tuning fork

  4. both A and B

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Correct Option: A
Explanation:

tuning  fork has two metal prongs which are vibrated and sound is produced so the answer is A.

Which of the following vibrating parts of instrument is not matched with the respective instrument?

physics world of sounds sound is produced by a vibrating body propagation of sound production and propagation of sound

  1. Drum- Stretched Membrane

  2. Tabla - Stretched Membrane

  3. Mridangam - Stretched Membrane

  4. None of the above

Show answer
Correct Option: D
Explanation:

all the instruments given here correctly matches with their vibrating parts.

so the answer is D.

Which of the following is the vibrating part of Saxophone?

physics world of sounds sound is produced by a vibrating body propagation of sound production and propagation of sound

  1. Stretched -Membrane

  2. Stretch-String

  3. Air column

  4. None of the above

Show answer
Correct Option: C
Explanation:

Wind instruments are those which are played by blowing air into them through the human mouth.  They include saxophone,  trumpet, flute etc. In any wind instrument,  it is the air column which vibrates with a specific tone and produces music.

In violin there is part which  is used to adjust the string for getting right pitch. What is the name of that part?

physics world of sounds sound is produced by a vibrating body propagation of sound production and propagation of sound

  1. Tunning peg

  2. Volute

  3. Finger board

  4. Neck

Show answer
Correct Option: A
Explanation:

tunning peg is used to adjust the string for getting right pitch in violin

so the answer is A.

Which of the following is/are  percussion instruments?

physics world of sounds sound is produced by a vibrating body propagation of sound production and propagation of sound

  1. Bell

  2. cymbals

  3. drum

  4. All of the above

Show answer
Correct Option: D
Explanation:

Percussion instruments are those which are played by hitting on the membrane of that instrument. They include instruments such as tabla, bell drum, cymbals etc.

Which of the following is the vibrating part of Banjo?

physics world of sounds sound is produced by a vibrating body propagation of sound production and propagation of sound

  1. Stretched- Membrane

  2. Stretched- String

  3. Air column

  4. None of the above

Show answer
Correct Option: B
Explanation:

String instruments are those which are played by manually vibrating the strings made of metal. When these strings are made to vibrate they emit a sound of a specific tone and produce music. Examples of such instruments are Banjo, guitar,  violin and so on. 

Assuming that the period of vibration of a tuning fork depends upon the length $l$ of its prongs density $\rho$ of its material and the elastic constant  $E$ of its material what would be the formula for the period of its vibration.

physics world of sounds sound is produced by a vibrating body propagation of sound production and propagation of sound

  1. $\frac{k}{l}\sqrt{\frac{y}{d}}$

  2. $\frac{2k}{l}\sqrt{\frac{y}{d}}$

  3. $\frac{k}{2l}\sqrt{\frac{2y}{d}}$

  4. $\frac{3k}{l}\sqrt{\frac{y}{2d}}$

Show answer
Correct Option: A
Explanation:

Considering $n=k{l}^{a}{d}^{b}{y}^{c}$--------(A) 

where k=dimensionless quantity 
l=length $=L$;  d=density$=kg/{m}^{3}$ and y=Young modulus$=kg/m{s}^{2}$
Substituting the above mentioned dimension in A we get,
$[{T]}^{-1}=[{L]}^{a}[{M{L}^{-3}]}^{b}[{M{L}^{-1}{T}^{-2}]}^{c}$
Comparing the power of $ML$  and $T$ we have,
$b+c=0$---------(1)
$a-3b-c=0$------(2)
$-2c=-1$
$c=\dfrac{1}{2}$
Putting the values of c in 1 we get,
$b=\dfrac{-1}{2}$
 Putting the values of b and c in 2 we get,
$a=-1$
Thus putting the values of a,b and c in A we get,
$n=k{l}^{-1}{d}^{1/2}{y}^{1/2}=\dfrac{k}{l}\sqrt{\dfrac{y}{d}}$ 

Match the following and choose the correct answer.

A String vibration 1 Tabla
B Membrane vibration 2 Bicycle bell
C Vibration of air 3 Sitar
D Vibration of plate 4 Flute
physics world of sounds sound is produced by a vibrating body propagation of sound production and propagation of sound

  1. A-1, B-2, C-3, D-4

  2. A-2, B-1, C-4, D-3

  3. A-3, B-1, C-4, D-2

  4. A-4, B-3, C-2, D-1

Show answer
Correct Option: C
Explanation:

String vibration is there in sitar.

Membrane vibration is there in tabla.
Vibration of air is in flute.
Vibration of plate is in bicycle bell.

The membrane of a drum vibrates to produce sound. Similarly the string of a sitar vibrates to produce sound. Based on these two examples answer the following question. Which part of a whistle vibrates to produce sound?

physics world of sounds sound is produced by a vibrating body propagation of sound production and propagation of sound

  1. Body of whistle

  2. Air

  3. Mouth of the person

  4. All of the above

Show answer
Correct Option: A
Explanation:

A body of whistle is responsible for the whistle to produce sound.

As air enters the whistle at one end.As the air reaches the other, closed end, all the air molecules fill up on top of each other and cause a high pressure region.The air escapes out the little hole in the end making a sound you hear.The frequency of sound depends on the length of the whistle.