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

  • question_answer
              \[{{W}_{1}}\]and\[{{W}_{2}}\]are the readings of two watt meters used to measure power of a 3-phase balanced load. The reactive power drawn by the load is            

    A)  \[{{W}_{1}}\]+\[{{W}_{2}}\]             

    B)  \[{{W}_{1}}-{{W}_{2}}\]

    C)  \[\sqrt{3}\,\,({{W}_{1}}+{{W}_{2}})\]

    D)  \[\sqrt{3}\,\,({{W}_{1}}-{{W}_{2}})\]

    Correct Answer: D

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