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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
State the approximate speed of ultrasound in air.
What do you understand by the term ultrasonic vibrations?
Name three animals which can hear ultrasonic vibrations.
What is Galton’s whistle? To what use is it put?
An electromagnetic wave has a time period of 4 × 10-8 s. Calculate its frequency in MHz.
What are ultrasonic?
Is the energy carried by the ultrasound very high or very low?
What does SONAR stand for? Where do we make use of SONAR?
1 hertz is equal to
