Tag: time period, frequency and amplitude of sound

Questions Related to time period, frequency and amplitude of sound

Which of the following statements is correct?

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

  1. Sound travels as waves

  2. Sound travels in straight lines

  3. Sound is a form of energy

  4. All of these

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Correct Option: A
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.

Sound waves in air cannot be polarised because they are 

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

  1. progressive

  2. stationary

  3. transverse

  4. longitudinal

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Correct Option: D
Explanation:

It is a conceptual and memory based question.

A pure sine wave is called 

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

  1. chord.

  2. melody

  3. tone

  4. overtone

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Correct Option: C
Explanation:

A pure sine wave with a certain frequency is called tone.
option "C" is correct.

A supersonic jet produces waves in air. The wave front is

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

  1. ellipsoidal

  2. conical

  3. spherical

  4. paraboloidal

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Correct Option: B
Explanation:

These waves are also called as shock waves, which are of conical shape when, a supersonic air craft moves faster than sound.

Which factors determine the quality of the note ?

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

  1. Wavelength.

  2. Frequency

  3. Time period.

  4. Wave form.

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Correct Option: D
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.

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

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

  1. True

  2. False

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Correct Option: B
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.

Shock waves are produced by objects

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

  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

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Correct Option: D
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).

Sound waves are not transmitted to long distance because,

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

  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

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Correct Option: A
Explanation:

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

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

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

  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.

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Correct Option: B
Explanation:

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

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

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

  1. Time period

  2. Half the time period

  3. 1 s

  4. 0.1 s

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Correct Option: A
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)