Advertisements
Advertisements
Question
The frequency of the stretched string of a fixed length is f when it is plucked in the middle. Where should it be plucked so that string vibrates with frequency (i) 2f, (ii) 3f?
Draw diagrams to show these vibrations and name them.
Advertisements
Solution
(i) The stretched string should be plucked at one-fourth part of the string to obtain frequency 2f:
(ii) The string should be plucked at one-sixth part of the string to obtain frequency 3f.
These vibrations are shown in the figure and are named as a fundamental, first overtone, and the second overtone respectively.
RELATED QUESTIONS
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:
1)The speed of sound.
2) The distance of the other cliff from the person
Decibel is the unit of pitch of a sound.
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
How does the wave pattern of a loud note differ from a soft note? Draw a diagram.
State three factors on which loundess of sound heard by a listener depends.
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.
Give scientific reason for the following:
Windows sometimes rattle when the low notes of a pipe organ are sounded.
Name the factors which determine the pitch of a note.
Give a scientific reason.
We can hear the movement of a mosquito’s wings but we cannot hear the movement of our hands.
