railway RRB Technician Grade 3 Mock Test 2024 Physics Waves Intensity and Sound Level

ಮಾನವರು ಕೇಳಬಹುದಾದ ಶಬ್ದದ ಕನಿಷ್ಠ ಆವೃತ್ತಿ ಯಾವುದು?

1
10 Hz
2
500 Hz
3
50 Hz
4
20 Hz
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