📊 Physics
Q. An ultrasonic sound wave has a frequency higher than ?
  • (A) 20 Hz
  • (B) 20000 Hz
  • (C) 200 Hz
  • (D) 2000 Hz
✅ Correct Answer: (B) 20000 Hz

Explanation: Ultrasonic waves are longitudinal waves of frequency greater than 20,000 Hz

Explanation by: Ritu Singhal
Ultrasonic waves are longitudinal waves of frequency greater than 20,000 Hz

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