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PHYSICS CH8 Sound — Science STD 9 — Question

Tamilnadu BoardEnglish MediumSTD 9SciencePHYSICS CH8 Sound1 Mark
MCQ
The frequency greater than 20,000 Hz is ………………. sound.
  • A
    infrasonic
  • ✓
    ultrasonic
  • C
    audible
  • D
    sonic
✓

Answer

Correct option: B.
ultrasonic
ultrasonic

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