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Question
Complete the following sentence:
Ultrasound is of frequency ___________.
Fill in the Blanks
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Solution
Ultrasound is of frequency above 20 kHz.
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RELATED QUESTIONS
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.
Name the sound of the frequency given below:
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Name the sound of the frequency given below:
1000 Hz
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State the approximate speed of ultrasound in air.
Sonar makes use of :
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