G

Gopal Sharma • 38.32K Points
Coach General Awareness

Q. पराश्रव्य तरंगों की आवृति कितनी होती है ?

(A) 20 हर्टज
(B) 20-20000 हर्टज के बीच
(C) 20000 हर्टज से अधिक
(D) 20000 हर्टज से कम
Correct Answer - Option (C)

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