Q. डेसिबेल शब्द किससे संबंधित है ?

(A) वायु
(B) भूमि
(C) ध्वनि
(D) जल

✅ Correct Answer: (C) ध्वनि

Published by Admin ⭐ 38.37K Points at 19-Jan-2021 03:25 pm in Science

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