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
In the diagram below, A, B, C, D are four pendulums suspended from the same elastic string PQ. The length of A and C are equal to each other while the length of pendulum B is smaller than that of D. Pendulum A is set into a mode of vibrations
1) Name the type of vibrations taking place in pendulums B and D?
2) What is the state of pendulum C?
3) State the reason for the type of vibrations in pendulum B and C.
In Fig. A, B, C and D are four pendulums suspended from the same elastic string XY. The lengths of pendulum A and D are equal, while the length of pendulum B is shorter and of the pendulum C is longer. Pendulum A is set into vibrations.
- What is your observation about the vibrations of pendulum D?
- Give reason for your observation in part (a).
- What type of vibrations take place in pendulums Band C?
- Give reason for the answer in part (c).
Give two examples of forced vibrations.
Explain why stringed musical instruments, like the guitar, are provided with a hollow box.
Explain why are soldiers asked to walk out of step while crossing bridges?
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 (or natural) vibrations?
What do you understand by free vibrations of a body? Draw a displacement-time graph to represent them. Given one example.
