Volume or Loudness

Q.

Characteristic of sound by which loud and soft sounds can be distinguished is ___ .

1. frequency

2. tone quality

3. pitch

4. amplitude

Q.

Sound energy passing per second through a unit area held perpendicular to the direction of propagation of sound waves is called the ___ .

1. Intensity of sound

2. pitch of sound

3. loudness of sound

4. quality of sound

Q.

Loudness of sound is expressed in___.

Q.

In which medium, out of the following, sound travels at the fastest rate?

Aluminium, copper, sea water, stone, hydrogen, air

Q. You are asked to lower the volume of your television. How will it affect the characteristics of the sound wave?

1. Increase in frequency
2. Decrease in amplitude
3. Increase in amplitude
4. Decrease in frequency

Q.

What is the SI unit of intensity of sound?

Q. Larger the amplitude of a sound wave, louder the sound.

1. True
2. False

Q. Which of the following is true about the speed of sound?

1. It is the highest for objects in solid state.
2. It decreases with the density in medium.
3. It is independent of the medium of propagation.
4. It increases from solid to gaseous state.

Q.

What is decibel?

Q.

The amplitude of a sound wave is increased from $1mm$ to $2mm$. The loudness of the sound will:

1. increase two times

2. increase four times

3. same

4. decrease

Q. To hear an echo, time interval between the original sound and the echo is ___.

1. less than 0.05 s
2. more than 0.1 s
3. 0.05 s
4. less than 0.1 s

Q.

As the distance between the listener and the source increases, loudness of the sound

1. remains same

2. decreases

3. increases

Q.

If we reduce the amplitude of a sound wave to one-third, then the loudness becomes-

1. 9 times

2. 3 times

3. 1/9 times

4. 1/3 times.

Q.

What is the effect of increase in temperature on the speed of sound in a given medium?

Q. Loudness is determined by the ________ of vibration.

1. 
   pitch
2. 
   intensity
3. 
   frequency
4. 
   amplitude

Q.

Velocity of sound in maximum in :-

1. Water

2. Oil

3. air

4. iron

Q. Assertion :The change in air pressure affects the speed of sound. Reason: The speed of sound increases is proportional to the square of pressure.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Match the following characteristics of a sound wave.

1. Loudness
2. Pitch
3. Inverse of frequency

Q.

Two waves of the same pitch have their amplitudes in the ratio $2:3$

What will be the ratio of their loudness?

Q.

Intensity of sound and loudness are the same thing and are measured in decibels.

1. True
2. False

Q.

Name the unit in which intensity of sound (loudness) is measured.

Q. How do we differentiate between the sound from a guitar and sound from a flute given that all the parameters of the two instrumentmare are same I.e. frequency , wavelength and amplitude?

Q. Which of the following is true about the speed of sound?

1. It decreases with the density in medium.
2. It increases from solid to gaseous state.
3. It is the highest for objects in solid state.
4. It is independent of the medium of propagation.

Q.

A man standing in front of a vertical cliff fires a gun and hears the echo after $4$ seconds. He moves $150m$ towards the cliff and again fires the gun. This time, he hears the echo after $3.6$ seconds. Find the distance of the cliff from his first position.

1. $1500m$

2. $750m$

3. $550m$

4. $7500m$

Q.

In which solid does sound travel the fastest?

Q. How is loudness of the sound is related to the intensity of wave producing it?

1. L = k log I²
2. L = k log 1/I
3. L = k log I
4. None of these

Q.

The loudness of a sound depends upon its.

1. Frequency

2. Amplitude

3. Pitch

4. None of these

Q. In which of the following media does sound travel the fastest?

1. Solids
2. Same in all media
3. Liquids
4. Gases

Q. Loudness is determined by the ________ of vibration.

1. 
   pitch
2. 
   intensity
3. 
   frequency
4. 
   amplitude

Q. Sound will travel fastest in :

1. Vacuum
2. Water
3. Steel
4. Air