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Railways NTPC (Technical Ability) Electrical Measurement and Instrumentation Question Bank Electrical Measurement and Instrumentation

  • question_answer
    The full range of audibility in audio frequency oscillator is

    A)  0 to 20 Hz                   

    B)  20 Hz to 2 kHz

    C)  20 Hz to 20 kHz

    D)  20 Hz to 20 MHz

    Correct Answer: C

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