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प्रश्न
A man can hear the sound of frequency :
पर्याय
1 Hz
1000 Hz
200 kHz
5 MHz
MCQ
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उत्तर
A man can hear the sound of frequency : 1000 Hz
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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:
Infrasonic sound is of frequency ______________.
State the approximate speed of ultrasound in air.
Explain how do bats locate the obstacles and prey in their way.
Sonar makes use of :
What do you understand by the term infrasonic vibrations?
What do you understand by the term ultrasonic vibrations?
Name three animals which can hear ultrasonic vibrations.
How do bats locate their prey during a flight?
An electromagnetic wave has a time period of 4 × 10-8 s. Calculate its frequency in MHz.
