New RBI Grade B 2025 Notification will come Soon! Enroll Here

    Question

    Sounds of frequencies less than about ______ vibrations

    per second cannot be detected by the human ear.
    A 40 Correct Answer Incorrect Answer
    B 35 Correct Answer Incorrect Answer
    C 20 Correct Answer Incorrect Answer
    D 50 Correct Answer Incorrect Answer

    Solution

    Human ear can not detect sound less than 20 vibration per second or above than 20000 vibration per second.

    Practice Next