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प्रश्न
Define the following term:
Frequency
Define the term frequency.
Define Frequency?
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उत्तर
The frequency of a particle executing S.H.M. is equal to the number of oscillations completed in one second.
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संबंधित प्रश्न
If the amplitude of vibration is large, sound is feeble.
Name the factor that determines Loudness of the sound heard.
Name the phenomenon that causes a loud sound when the stem of a vibrating tuning fork is kept pressed on the surface of a table.
The ratio of the amplitude of two waves is 3 : 4. What is the ratio of their Frequencies?
What do you understand by the loudness of sound?
A person standing between two vertical cliffs and 480 m from the nearest cliff shouts. He hears the first echo after 3s and the second echo 2s later. Calculate:
- The speed of sound.
- The distance of the other cliff from the person
State one important property of waves used for echo depth sounding.
In a longitudinal wave, compression and rarefaction are formed.
How does sound travel in air?
Which of the following determines the loudness of a sound wave?
Name the unit in which the loudness of sound is expressed.
Why is the loudness of sound heard by a plucked wire increased when mounted on a sound board?
Name the characteristic of sound related to its frequency
Name and define the characteristic which enables one to distinguish two sounds of same loudness, but of different frequencies, given by the same instrument.
Two identical guitars are played by two persons to give notes of the same loudness and pitch. Will they differ in quality? Give reason for your answer.
Name the characteristic of the sound affected due to a change in its
(a) amplitude (b) waveform (c) frequency.
Figure shows four waves A, B, C, and D
Name the wave which shows
(a) a note from a musical instrument,
(b) a soft note
(c) a shrill note.
Two waves of the same pitch have amplitudes in the ratio 1:3. What will be the ratio of loudness?
Two identical guitars are played by two persons to give notes of the same pitch. Will they differ in quality? Give a reason for your answer.
It is observed that during march-past we hear a base drum distinctly from a distance compared to the side drums.
(i) Name the characteristics of sound associated with the above obervation.
(ii) Give a reason for the above observation.
Explain the following and illustrate your answer by drawing appropriate diagram:
Loudness
Give scientific reason for the following:
When a nail is hammering appears to get higher and higher in pitch.
How do you account for the fact that two strings can be used to give notes of the same pitch and loudness but of different quality?
What is meant by the ‘pitch’ of a note? Does it depend on the loudness or ‘quality’ of the ‘note’? How is pitch ‘related’ with frequency?
Give a scientific reason.
We can hear the movement of a mosquito’s wings but we cannot hear the movement of our hands.
What does the intensity of sound depend upon?
Give scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
Give scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
