Advertisements
Advertisements
Question
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.
Advertisements
Solution
(i) By decreasing the vibrating length of the string,
(ii) By increasing the tension on the string,
(iii) By decreasing the radius of the string.
RELATED QUESTIONS
Distinguish between the free (or natural) and forced vibrations.
Give one example to illustrate forced vibrations.
Differentiate between the forced and resonant vibrations.
Why is a loud sound heard at resonance?
When a body vibrates under a periodic force, the vibrations of the body are ______.
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.
What do you understand by forced vibrations?
