Characteristics of Sound

Q.

How do you calculate the frequency of oscillation?

Q.

The loudness of sound depends upon

1. Its velocity

2. Its amplitude

3. Its pitch

4. Its frequency

Q.

State any four factors on which the loudness of sound depends.

Q.

Explain the difference between soft and loud sound using diagrams.
[3 MARKS]

Q. The speed of light and sound has maximum value in ______ and ______ medium respectively.

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

Q.

What happens to sound when frequency is increased?

Q.

Two tuning forks have frequencies $380Hz$ and $384Hz$ respectively. When they are sounded together, they produce $4$ beats. After hearing the maximum sound, how long will take to hear the minimum sound?

Q.

The amplitude of a sound wave is expressed in hertz (Hz).

1. False

2. True

Q.

Represent graphically by two separate diagrams in each case

(i) Two sound waves having the same amplitude but different frequencies.

(ii) Two sound waves having the same frequency but different amplitudes.

(iii) Two sound waves have different amplitudes and also different wavelengths.

Q.

What is the difference between a note and a tone?

1. Note has a single frequency while a tone has mixed frequencies

2. Tone has a single amplitude while a note has mixed frequencies

3. Note has a single frequency while a tone has mixed frequencies

4. Tone has a single frequency while a note has mixed frequencies

Q.

A wave source produces $20$ crests and $20$ troughs in $0.2seconds$. Find the frequency of the wave.

1. $200Hz$

2. $500Hz$

3. $300Hz$

4. $100Hz$

Q.

What Is Oscillation Frequency?

Q.

The maximum displacement of the particle on either side from the mean position is known as _____.

1. wavelength of the wave

2. amplitude of the wave

3. frequency of the wave

4. pitch of the wave

Q.

When we change feeble sound to loud sound, we increase its:

1. Wavelength
2. Velocity
3. Amplitude
4. Frequency

Q.

The wavelength of the wave in the diagram above is given by letter _____ .

Q.

What are the characteristics of vibrations?

Q. The distance between two consecutive crest or trough is known as.

1. wavelength
2. frequency
3. time period

Q.

Before playing the orchestra in a musical concert, a sitarist tries to adjust the tension and pluck the string suitably. By doing so, he is adjusting the:

1. Intensity of sound

2. Frequency of the sound

3. Amplitude of sound

4. Loudness of sound

Q.

We have a stringed musical instrument. The string is plucked in the middle first with a force of greater magnitude and then with a force of smaller magnitude. In which case would the instrument produce a louder sound?

Q. A sound source sends waves of $400Hz$. It produces waves of wavelength $2.5m$. The velocity of sound waves is:

1. 1000

Q.

Time period of a wave is $0.01s$. Its frequency is $10Hz$.

1. True
2. False

Q.

Which of the following graphs represents higher pitch of sound?

1. 

2. 

3. 

4. 

Q. If the frequency of a wave is 10 Hz, what is the time period?

1. $10s$
2. $0.1s$
3. $0.01s$
4. $100s$

Q.

The loudness of sound is determined by the

1. amplitude of vibration

2. frequency of vibration

3. the ratio of amplitude and frequency of vibration

4. product of amplitude and frequency of vibration

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

1. It decreases with increase in temperature.
2. It is more in solid state as compared to the gaseous state.
3. It is the same in liquid and gaseous state.
4. It is the same in solid and gaseous state.

Q. Which of the following units can be used to measure the frequency of a sound wave?

1. hertz
2. second
3. second${}^{-1}$
4. metre

Q.

The number of oscillations per second of a vibrating object is called its time period

1. True
2. False

Q.

Which of the following are the characteristics of sound?

1. Pitch

2. Loudness

3. Quality

4. None of these

Q.

The displacement-time graph for a particle in a wave is shown below. Then the time period of the wave is

1. $16s$

2. $8s$

3. $2s$

4. $6s$

Q. Question 9
Pitch of sound is determined by its

(a) Frequency
(b) Amplitude
(c) Speed
(d) Loudness