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प्रश्न
What are ultrasonic? State and explain two applications of ultrasounds.
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उत्तर
Ultrasonic sound is the sound having frequency more than 20KHz. The application of ultrasonic sound is as follows:
(i) It is used to detect the flaws in metal casting of automobile tyres.
(ii) Used in hospitals to detect defects in certain parts of the body.
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संबंधित प्रश्न
Name the sound of the frequency given below:
1000 Hz
Name the sound of the frequency given below:
40 kHz
A man can hear the sound of frequency :
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The range of audible frequency for the human ear is
