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प्रश्न
What are ultrasonic?
उत्तर
Ultrasonic are sounds having frequency higher that 20 KHz and not audible to the human being.
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संबंधित प्रश्न
A microphone is connected to the Y-input of a C.R.O Three different sounds are made in turn in front of the microphone. Their traces (a), (b) and (c) produces on the screen are shown in following figure.
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| (a) | (b) | (c) |
- Which trace is due to the loudest sound? Give reason for your answer.
- Which trace is due for the sound with the lowest pitch? Explain your answer.
Complete the following sentence:
Ultrasound is of frequency ___________.
Complete the following sentence:
Bats can produce and hear ___________ sound.
Name the sound of the frequency given below:
1000 Hz
Explain how do bats locate the obstacles and prey in their way.
State two applications of ultrasound.
What do you understand by the term sonic vibrations? State the range of sonic vibrations for the human ear.
State four practical uses of ultrasonic vibrations.
Is the energy carried by the ultrasound very high or very low?
1 hertz is equal to
