Piezoelectric materials serve as a source of ____________ ?
Correct answer: D. ultrasonic waves
- A. resonant waves
- B. musical waves
- C. microwaves
- D. ultrasonic waves
Explanation
Piezoelectric crystals convert electrical energy into mechanical vibrations and are commonly driven at high frequency to generate ultrasonic waves. This principle is used in ultrasonic transducers and medical imaging probes.
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