Advertisements
Advertisements
प्रश्न
The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?
Advertisements
उत्तर
Frequency is defined as the number of oscillations per second. It is given by the relation:
`"Frequency"="Number of oscillations"/"Total time"`
Number of oscillations = Frequency × Total time
Given, Frequency of sound = 100 Hz
Total time = 1 min = 60 s
Number of oscillations/Vibrations = 100 × 60 = 6000
Hence, the source vibrates 6000 times in a minute, producing a frequency of 100 Hz.
APPEARS IN
संबंधित प्रश्न
How does the frequency of sound given by a stretched string depend on its
- length,
- tension?
The sound of an explosion on the surface of a lake is heard by a boat man 100 m away and by a diver 100 m below the point of explosion.
(i) Who would hear the sound first: boatman or diver?
(ii) Give a reason for your answer in part (i).
(iii) If sound takes time t to reach the boatman, how much time approximately does it take to reach the diver?
The speed of sound in air at 0°C is nearly :
Select the correct option:
In the region of compression or rarefaction, in a longitudinal wave, the physical quantity which does not change is:
Match the following
| 1. | Infrasonic | (a) | Compressions |
| 2. | Echo | (b) | 22 kHz |
| 3. | Ultrasonic | (c) | 10 Hz |
| 4. | High-pressure region | (d) | Ultrasonography |
Why does an empty vessel produce more sound than a filled one?
A key of a mechanical piano struck gently and then struck again but much harder this time. In the second case
Assertion: The sound of thunder is heard a little later than the flash of light.
Reason: The speed of sound is much less than the speed of light.
