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Discussion :: Synchronous Motors

  1. A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have

    2. A.

     no change of power factor
    B.

     lagging power factor with over-excitation
    C.

     leading power factor with under-excitation
    D.

     leading power factor with over-excitation

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    Answer : Option D

    Explanation :

    Explanation Not Provided

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