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Discussion :: Measurements and Instrumentation

  1. A rectifier voltmeter using bridge rectifier and PMMC meter is calibrated to read rms value of sine wave. A triangular wave is applied to it and it reads 6.82 V. The rms value of triangular wave is

    2. A.
    about 6.82 V
    B.
    about 7.1 V
    C.
    about 6.5 V
    D.
    about 10 V

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    Answer : Option B

    Explanation :

    Peak value of triangular wave is twice average value = 2 x 6.144 = 12.288 V rms value of triangular wave is peak value divided by 3 .

    Therefore, reading .

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