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प्रश्न
Explain a person walking past a railway line, in the middle of night hears a ringing sound along with the sound of his footsteps.
उत्तर
When the vibrations produced by the feet of the person are impressed on the rails, they vibrate with forced vibrations, thereby producing a loud sound.
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संबंधित प्रश्न
Define the Resonance phenomenon?
How does the medium affect the amplitude of free/natural vibrations of a body?
A vibrating tuning fork, held over an air column of a given length with its one end closed, produces a loud audible sound. Name the phenomenon responsible for it and explain the observation.
Why are the stringed instruments like guitar provided with a hollow sound box?
Two pendulums C and D are suspended from a wire as shown in the figure give below. Pendulum C is made to oscullate by displaying it from its mean position. It is seen that D also starts oscillating.
(i) Name the type of oscillation, C will execute.
(ii) Name the type of oscillation, D will execute.
(iii) If the length of D is made equal to C then what difference will you notice in the oscillations of D ?
(iv) What is the name of the phenomenon when the length of D is made equal to C ?
Differentiate between the following:
Light and sound waves.
Differentiate between the following:
Free and forced vibrations.
Explain why are soldiers asked to walk out of step while crossing bridges?
Explain free and forced vibrations. Give an experimental arrangement to illustrate the phenomenon of resonance.
