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The frequency of ultrasonic waves is
20 kHz
more than 20 kHz
more than 20000 ร
more than 20000 m
20 kHz
Quick Summary: Practice and solve "The frequency of ultrasonic waves is..." for Electrical - Electrical Materials. The correct answer is Option A: 20 kHz. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Answer:
Option **(b) **