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प्रश्न
(a) Which one of the following graphs A or B shows free vibrations in a vacuum and which one shows free vibrations in a medium?
(b) How did you come to this conclusion.
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उत्तर
- Graph A represents free vibration in a vacuum and Graph B represents free vibration in the medium.
- For free vibrations in a vacuum, there is no resisting force, thus the amplitude will remain the same with time. Whereas for free vibrations in a medium there is always a resistive force, thus the amplitude reduces with time due to this resistive force.
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संबंधित प्रश्न
State the ways by which the frequency of transverse vibrations of a stretch string can be increased.
What do you understand by free vibrations of a body?
State one condition for a body to execute free/natural vibrations.
- Name one factor on which the frequency of sound emitted due to vibrations in an air column depends.
- How does the frequency depend on the factor stated in part (a).
Explain why strings of different thicknesses are provided on a stringed instrument.
[Hint: Natural frequency of vibration of a stretched string is inversely proportional to the radius (or thickness) of string so notes of different frequencies can be produces by vibrating different strings.]
Explain why does a wine glass starts rattling, when a note of some particular frequency is struck by a piano?
Explain why strings of different thicknesses are provided on a stringed instrument.
Where can a body execute natural vibrations?
