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प्रश्न
A metallic blade is made to vibrate at its one end by keeping its other end clamped. The vibrations of the blade die away after some time. Explain, how you lower the frequency of the vibration of the blade?
उत्तर
The vibrations of the blade die away after some time due to air resistance (or damping)
The frequency of vibration of the blade can be lowered:
(i) Increasing the vibrating length of the blade,
(ii) Increasing the thickness of the blade.
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संबंधित प्रश्न
Give one example of damped vibrations
Why does the amplitude of a vibrating body continuously decrease during damped vibrations?
What are damped vibrations? How do they differ from free vibrations? Give one example of each.
The following diagram shows the displacement – time graph of the vibrating body.
- Name the kind of vibrations
- Give one example of such vibrations.
- Why is the amplitude of vibrations gradually decreasing?
- What happens to the vibrations of the body after some time?
A tuning fork is set into vibration in air. Name the kind of vibrations it executes.
Draw a sketch showing the displacement of a body executing damped vibrations against time.
Draw a displacement time graph to illustrate damped vibrations.
A metal foot ruler is held at the edge of a table. It is pressed at its free end and then released. It vibrates.
- Name the vibrations produced.
- State one way to increase the frequency of these vibrations.
A tuning fork is vibrating in air. State whether the vibrations are natural or damped?
