Science · Physics
पराश्रव्य तरंगों की आवृत्ति कितनी होती है?
- 1सटीक 20,000 हर्ट्ज
- 220,000 हर्ट्ज से अधिक✓
- 320 से 20,000 हर्ट्ज के बीच
- 420 हर्ट्ज से कम
सही उत्तर देखें
20,000 हर्ट्ज से अधिक
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