Advertisements
Advertisements
Question
A tuning fork of frequency 256 Hz will resonate with another tuning fork of frequency:
Options
128 Hz
256 Hz
384 Hz
512 Hz
Advertisements
Solution
A tuning fork of frequency 256 Hz will resonate with another tuning fork of frequency 256 Hz.
Hint: Resonance occurs when the frequency of an externally applied periodic force on the body is equal to its natural frequency.
RELATED QUESTIONS
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.
What are forced vibrations?
Distinguish between the free (or natural) and forced vibrations.
Give one example to illustrate forced vibrations.
Differentiate between the forced and resonant vibrations.
When a body vibrates under a periodic force, the vibrations of the body are ______.
In fig. , P, Q, R and S represent test tubes each of height 20 cm which are filled with water upto heights of 10 cm, 14 cm, 16 cm and 18 cm respectively. If a vibrating tuning fork is placed over the mouth of test tube Q, a loud sound is heard.
(i) Describe the observations with the tubes P, R and S.
(ii) Give the reason for your observation in each case.
(iii) State the principle illustrated by the above experiment.
Give two examples of forced vibrations.
