Tag: nature and characteristics of sound waves

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Questions Related to nature and characteristics of sound waves

Multiple choice physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

Which of the following statements is correct?

  1. Sound travels as waves

  2. Sound travels in straight lines

  3. Sound is a form of energy

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sound travels as mechanical waves. A mechanical wave is a disturbance that moves and transports energy from one place to another through a medium. In sound, the disturbance is a vibrating object. And the medium can be any series of interconnected and interactive particles. This means that sound can travel through gases, liquids and solids.

Solution A: Sound travels as waves.

Multiple choice physics world of sounds time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

Which factors determine the quality of the note ?

  1. Wavelength.

  2. Frequency

  3. Time period.

  4. Wave form.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Quality is used to describe the quality of the waveform as it appears to the listener. Therefore,  the quality of a note depends upon the waveform. 
Two notes of the same pitch and loudness, played from different instruments do not sound the same because the waveforms are different and therefore differ in quality or tone.

Multiple choice physics world of sounds time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

State whether given statement is True or False
Wave form is equivalent to quality 

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Quality is used to describe the quality of the waveform as it appears to the listener. Therefore,  the quality of a note depends upon the waveform. 
Two notes of the same pitch and loudness, played from different instruments do not sound the same because the waveforms are different and therefore differ in quality or tone.
Hence, quality of the sound is affected due to the change in its waveform.

Multiple choice physics world of sounds time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

Shock waves are produced by objects

  1. carrying electric charges and vibrating

  2. vibrating with frequency greater than 20000Hz

  3. vibrating with very large amplitude

  4. moving with a speed greater than that of sound in the medium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Shocks are caused by objects moving faster than the speed of sound in the medium.
(The shock tries to bring the velocity of the fluid in the medium to subsonic).

Multiple choice physics world of sounds time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

Sound waves are not transmitted to long distance because,

  1. they are absorbed by the atmosphere

  2. they have constant frequency

  3. the height of antenna required, should be very high

  4. velocity of sound waves is very less
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sound waves are not transmitted to long distance because they are absorbed by the atmosphere. 

Multiple choice physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

A sound is produced by plucking a string in a musical instrument, then

  1. the velocity of wave in the string in equal to the velocity of sound in the string.

  2. the frequency of the wave in the string in equal to the frequency of the sound produced.

  3. the wave in the string is progressive.

  4. the tension in string varies from point to point.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Frequency of the wave is the property which depends on source.

Multiple choice physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

If A is the amplitude of vibration, then the time taken by a wave to cover a distance of 4A is known as

  1. Time period

  2. Half the time period

  3. 1 s

  4. 0.1 s
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Time required to complete one vibration is T secs

In one full vibration, the particle covers a total distance of 4A

Thus, time required to cover a total distance of 4A during one vibration is T secs or 1 Time period

The correct option is (a)