Piezoelectric materials convert electrical energy into mechanical vibrations and vice versa. By applying a high-frequency alternating voltage across a piezoelectric crystal, it vibrates at that frequency, generating ultrasonic waves.
Ultrasonic waves are produced by making use of
Asked in UPSC CDS 2 2017 · Topic: Sound (Ultrasound and Infrasound: Production, Properties, and Applications (SONAR, Medical, Industrial))
More Physics questions
- What is/are not true among the following? (i) Audible range of sound for human beings is approximately 20 Hz to 10 kHz. (ii) Sound waves with frequencies higher than 10 kHz are called ultrasound. (iii) In earthquake, ultrasounds are produced before main shock waves.
- Which one of the following statements with regard to ultrasonic waves is NOT correct?
- Infrasonic sounds have frequencies
- Ultrasonic waves of frequency 3 × 10⁵ Hz are passed through a medium where speed of sound is 10 times that in air (Speed of sound in air is 300 m/s). The wavelength of this wave in that medium will be of the order of
- Which one of the following statements is not correct ?
- The frequency of ultrasound waves is
- Compared to audible sound waves, ultrasound waves have
- SONAR is a device that is used to measure the distance of underwater objects by a ship. Which of the following types of waves does it use for this purpose?