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Discussion :: Measurements and Instrumentation

  1. For power measurement of three phase circuit by two wattmeter method, when the value of power factor is less than 0.5 lagging

    2. A.

     One of the wattmeters will read zero
    B.

     Both give the same readings
    C.

     One of the wattmeter connections will have to be reversed
    D.

     Pressure coil of the wattmeter will become ineffective.

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    Answer : Option C

    Explanation :

    Explanation Not Provided

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