N Neha Sharma 🎓 Tutor III ⭐ 7.80K Points 📊 Physics Q. Ultrasound devices operate with minimum frequency from (A) 20kHz (B) 35 kHz (C) 45 kHz (D) 60 kHz 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (A) 20kHz You must be Logged in to update hint/solution 💬 Discussion 💬 Comment