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प्रश्न
How do you tune your radio set to a particular station ? Name the phenomenon involved in doing so and define it.
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उत्तर
Resonance is the basis for radio tuning. You may alter the frequency of the electrical vibrations produced by them by adjusting the values of the individual components in the electronic circuits that make them up. Changing the values of a few electrical components causes vibrations at a frequency that matches the desired radio wave frequency, and that's all. When the two frequencies are in resonance with one another, the incoming waves carry the signal energy of the matching frequency. In the receiver set, the signal is then amplified.
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संबंधित प्रश्न
Name the phenomenon involved in tunning a radio set to a particular station
Distinguish between the free (or natural) and forced vibrations.
Resonance is a special case of ______ vibrations, when frequency of the driving force is ______ natural frequency of the body.
Differentiate between the forced and resonant vibrations.
In following figure shows A, B , C and D represent test tube each of height 20 cm which are filled with water up to heights of 12 cm, 14 cm, 16cm and 18cm respectively. If a vibrating tuning fork is placed over the mouth if test tube D, a loud sound is heard.
- Describe the observations with the tubes A, B and C when the vibrating tuning fork is placed over the mouth of these tubes.
- Give the reason for your observation in each case.
- State the principle illustrated by the above experiment.
A tuning fork of frequency 256 Hz will resonate with another tuning fork of frequency:
A bucket kept under a running tap is getting filled with water. A person sitting at a distance is able to get an idea when the bucket is about to be filled.
(i) What change takes place in the sound to give this idea?
(ii) What causes the change in the sound?
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 a person walking past a railway line, in the middle of night hears a ringing sound along with the sound of his footsteps.
A string stretched between its ends is made to vibrate by placing the stem of a vibrating tuning fork at its one end. State three ways how you will increase the frequency of note produced by the string.
