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Discussion :: Measurements and Instrumentation

  1. Which of the following methods can be used to measure power in a single phase circuit without using wattmeter?

    1. One voltmeter, one ammeter
    2. Two voltmeters, two ammeter
    3. Three voltmeters
    4. Three ammeters

    2. A.
    1 and 2 only
    B.
    2 and 4 only
    C.
    1 and 3 only
    D.
    3 and 4 only

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    Answer : Option D

    Explanation :

    Single phase power can be measured using either 3 voltmeters or 3 ammeters.

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