Advertisements
Advertisements
प्रश्न
State the properties of ultrasound that make it useful.
उत्तर
High Power , High Energy and good directionality are the properties of ultrasonic sounds which makes them useful.
APPEARS IN
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.
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.
 |
 |
 |
| (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:
100 Hz
State the approximate speed of ultrasound in air.
The properties of ultrasound that make it useful are
What do you understand by the term infrasonic vibrations?
What do you understand by the term ultrasonic vibrations?
State four practical uses of ultrasonic vibrations.
What are infrasonic and ultrasonic sounds?
State the main components of a hearing aid.
