Advertisements
Advertisements
प्रश्न
When acoustic resonance takes place, a loud sound is heard. Why does this happen? Explain.
Advertisements
उत्तर
When acoustic resonance takes place, a loud sound is heard. This is because the natural frequency becomes equal to the frequency of externally applied force hence a loud sound is heard.
संबंधित प्रश्न
What are mechanical waves?
The adjacent diagram shows three different modes of vibrations P, Q and R of the same string.

(i) Which vibration will produce a louder sound and why?
(ii) The sound of which string will have maximum shrillness?
(iii) State the ratio of wavelengths of P and R.
Give one example to illustrate forced vibrations.
Differentiate between the following:
Radio waves and light waves.
Explain why stringed musical instruments, like the guitar, are provided with a hollow box.
Explain a tuning fork (vibrating) is held close to ear. One hears a faint sound. The same vibrating tuning fork is placed on table, such that its handle is in contact with table, one hears a loud sound.
A vibrating tuning fork is placed over the mouth of a burette filled with water. The tap is opened and the water level gradually falls. It is observed that the sound becomes the loudest for a particular length of the air column. What is the name of the phenomenon taking place when this happens? Why does the sound become the loudest?
A string stretched between its ends is made to vibrate by placing the stem of a vibrating tuning fork at its one end. State three ways how you will increase the frequency of note produced by the string.
What do you understand by free vibrations of a body? Draw a displacement-time graph to represent them. Given one example.
