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प्रश्न
Ultrasound has frequency of vibration
पर्याय
between 20 and 20000 Hz
below 20 Hz
above 20000 Hz
between 500 and 10000 Hz
उत्तर
above 20000 Hz
Explanation -
Ultrasound has frequency of vibration above 20000 Hz.
APPEARS IN
संबंधित प्रश्न
The sketches I to IV in following Figure show sound waves, all formed in the same time interval.
 |
 |
| I | II |
 |
 |
| III | IV |
Which diagram shows
- a note from a musical instrument
- a soft (or feeble) note,
- a bass (low frequency) note.
Complete the following sentence:
Bats can produce and hear ___________ sound.
What is ultrasound?
Explain how do bats locate the obstacles and prey in their way.
What do you understand by the term infrasonic vibrations?
What is Galton’s whistle? To what use is it put?
State four practical uses of ultrasonic vibrations.
What does SONAR stand for?
What does SONAR stand for? Where do we make use of SONAR?
Describe a simple method to find the depth of a submerged ship.
