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प्रश्न
What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency?
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उत्तर १
उत्तर २
The spot where the stretched string is plucked is altered as an adjustment.
-
We are aware that when a string is forced to vibrate, it produces transverse waves with varying amplitude and frequencies. These can be altered by adjusting the location at which the string is plucking.
- middle
- `1/4`th part of string
- `1/6` is the part of a string to produce the principal tone, first subsidiary or second subsidiary, respectively.
-
Moreover, FREQUENCY can be altered by adjusting the string's thickness. By twisting the pegs on a string, the tension can also be altered.
संबंधित प्रश्न
Explain how the principle of echo is used by
The bat during its flight at
Explain how is the principle of echo used by
(a) The bat during its flight at night,
(b) The dolphin to locate small fish as its prey.
A type of electromagnetic wave has a wavelength of 50 Å. Name the wave and state one use of this type of wave.
Waves produced on the surface of the water are formed to move with a velocity of 24 ms−1. If the wavelength of these waves equals 20 cm. find the
(i) frequency (no. of waves produced per second)
(ii) the time period (i.e. the time required to produce one wave) for these waves.
(i) A man stands at a distance of 68 m from a cliff and fires a gun. After what time interval will he hear the echo, if the speed of sound in air is 340 ms−1?
(ii) If the man had been standing at a distance of 12 m from the cliff would he have heard a clear echo?
Explain reflection at the boundary of a rarer medium.
A sound wave whose frequency is 5000 Hz travels in air and then hits the water surface. The ratio of its wavelengths in water and air is ______.
Match the following:
| 1. | Stethoscope | a. | Repeated reflections |
| 2. | Echogram | b. | Multiple reflections |
| 3. | SONAR | c. | Ultrasonic waves |
| 4. | Reverberation | d. | Speed of underwater objects |
