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प्रश्न
State two ways in which resonance differs from forced vibrations.
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उत्तर
(i) In resonance it is necessary that the frequency of externally applied force should be equal to the natural frequency of the body whereas, it is not necessary for forced vibrations.
(ii) In forced oscillations, the amplitude of oscillations is small whereas, in resonance the amplitude of vibration is large.
संबंधित प्रश्न
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.
Resonance is a special case of ______ vibrations, when frequency of the driving force is ______ natural frequency of the 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.
When a troop crosses a suspension bridge, the soldiers are asked to break steps. Explain the reason.
A tuning fork of frequency 256 Hz will resonate with another tuning fork of frequency:
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 ?
On keeping the stem of a vibrating tuning fork on the surface of a table, a loud sound is heard. Give reason.
The rearview mirror of a motorbike starts vibrating violently at some particular speed of the motorbike. What is the name of the phenomenon taking place? Why does the happen?
Explain why are soldiers asked to walk out of step while crossing bridges?
Describe a simple experiment to illustrate the phenomenon of resonance and explain it.
