Characteristics of Sound Waves

Q. Loudness and pitch of a sound wave depends upon ______ and ______, respectively.​

1. Frequency, amplitude
2. Amplitude, frequency
3. Wavelength, frequency​
4. Frequency, wavelength​

Q.

An object is vibrating at 50 hertz. What is its time period?

1. 0.02 s

2. 2 s

3. 0.2 s

4. 20.0 s

Q.

The loudness or softness of a sound is determined by:

1. Amplitude

2. Time period

3. Wavelength

4. Frequency

Q. Calculate the audible range of wavelength in air if the speed of sound in air is 340 m/s.​

1. 17 cm - 17 m
2. 17 mm – 17 m
3. 17 m – 17 km
4. 17 cm – 17 km

Q.

Shrillness of sound referred as the___________ of sound.

Q.

Which aspect of a sound wave is related to the loudness?

1. Frequency

2. Wavelength

3. Amplitude

4. Time period

Q.

A swing has a time period of 1.4 seconds. The no. of oscillations made by it within 1 minute 24 seconds will be:

1. 40

2. 20

3. 60

4. 80

Q.

Use the following information to answer the next question.

Which wave represents the loudest sound?

1. I

2. III

3. II

4. IV

Q.

Question 10
The given graph shows the displacement versus time relation for a disturbance travelling with velocity of $1500m{s}^{-1}$ . Calculate the wavelength of the disturbance

Q. Arrange the following media in increasing order of speed of sound through them.

1. Solid
2. Gas
3. Liquid
4. Vacuum

Q. The ratio of loudness of two sound waves, A and B is 3 : 4. If the amplitude of sound A is doubled and that of sound B is tripled, then the ratio of loudness of sound A and B becomes

दो ध्वनि तरंगों A तथा B की प्रबलता का अनुपात 3 : 4 है। यदि ध्वनि A के आयाम को दोगुना किया जाता है तथा ध्वनि B के आयाम को तिगुना किया जाता है, तब ध्वनि A तथा B की प्रबलता का अनुपात हो जाता है

1. 3 : 1
2. 1 : 3
3. 16 : 27
4. 1 : 1

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

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

Q. The lowest pitch detectable as sound by an average human ear corresponds to 20hz and the highest to 20000hz .what is the wavelength of each in air? Take the velocity 330 ms /s

Q.

Loudness and softness of sound depends on

1. Speed of the wave

2. Amplitude of the wave

3. wavelength of the wave

4. time period

Q. Statement 1: Unit of loudness is decibel (dB).
Statement 2: Timbre of sound depends on the shape of the waveform.

1. Statement 1 is true, statement 2 is false
2. Statement 1 is false, statement 2 is true
3. Both statements are true
4. Both statements are false

Q.

The wavelength of a sound wave is $66m.$ Calculate the frequency of the wave if the velocity of sound is $330m/s$. Would this sound be audible to the human ear?

Q. Two sounds A and B have the frequencies f and 2f, respectively. Which of the following can be a valid conclusion?

1. Sound A is deep while sound B is shrill.
2. Sound A is louder than sound B.
3. Sound A is shrill while sound B is deep.

Q.

One Hertz is equal to

1. Ten cycle/ second

2. One cycle/ hour

3. One cycle/minute

4. One cycle/ second

Q. Sounds of same loudness and pitch but produced by different musical instruments like violin and flute are distinguishable. Why? Give reason.

Q.

which of these determine the loudness of a sound wave ;- amplitude , frequency , wavelength

Q. Find the range of frequency of light that is visible to an average human being .

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Pitch is a property of sound associated with its shrillness.

1. True
2. False

Q.

Question 10
The given graph shows the displacement versus time relation for a disturbance travelling with velocity of $1500m{s}^{-1}$ . Calculate the wavelength of the disturbance

Q. Pitch depends upon the frequency of the sound waves.

1. True
2. False

Q. [Forwarded from nishant nepali] A source of sound ( velocity = 330 m/s ) produce waves in frequency range 500hz to 6600hz. Find the wavelength range of sound produced.

Q. The sound produced by the seconds pendulum is infrasonic.

Q. A person can hear sound waves in the frequency range 20 Hz to 20 kHz. Find the minimum and the maximum wavelengths of sound that is audible to the person. The speed of sound is 360 m s⁻¹.

Q. a whistle producing sound wave of frequency 9500 hz and above its approaching a stationary person with speed of v m/s velocity of sound in air is 300 m/s . if a person can here frequency upto 10000 hz . what is maximum value of v which hear whistle.