Free, Damped and Forced Vibrations; Resonance
Important Questions on Free, Damped and Forced Vibrations; Resonance
How do you tune your radio set to a particular station? Name the phenomenon involved in doing so and define it.
Why are the stringed instruments like guitar provided with a hollow sound box?
When a troop crosses a suspension bridge the soldiers are asked to break steps. Explain the reason.
In the figure, A, B, C, and D represent test tubes each of height which is filled with water up to heights of respectively. If a vibrating tuning fork is placed over the mouth of test tube D, a loud sound is heard. Describe the observations with tubes A, B, and C when the vibrating tuning fork is placed over the mouth of these tubes.
What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency?
State two ways of increasing the frequency of vibrations of a stretched string.
State one way of increasing the frequency of a note produced by an air column.
Name one factor on which the frequency of sound emitted due to vibrations in an air column depends.
State one condition for a body to execute free vibrations.
Draw a graph between displacement from mean position and time for a body executing free vibrations in vacuum.
What is meant by the natural frequency of vibrations of a body? Name one factor on which it depends?
What do you understand by free vibrations of a body? Give one example.
The digram in fig. 7.12 shows the displacement time graph of a vibrating body.
(iv) What happens to the vibrations of the body after some time.
The digram in fig. 7.12 shows the displacement time graph of a vibrating body.
(iii) Why is the amplitude of vibrations gradually decreasing.
The digram in fig. 7.12 shows the displacement time graph of a vibrating body.
(i) Give one example of such vibrations.
The digram in fig. 7.12 shows the displacement time graph of a vibrating body.
(i) Name the kind of vibrations.
What are damped vibrations? How do they differ from the vibrations? Give one example of each.
How does the medium affect the amplitude of free vibration of a body? Explain.
