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← TechnologyWhich outcome results when a synchronous generator's field excitation is suddenly reduced while connected to a power grid?
A)Reactive power absorption increases sharply✓
B)Active power output rapidly increases
C)Terminal voltage immediately rises
D)Rotor angle decreases below stable limit
💡 Explanation
When field excitation decreases, the generator requires more reactive power from the grid to maintain voltage, because the reduced field weakens its generated EMF, creating a reactive power deficit. Therefore reactive power absorption increases, rather than power output or voltage rise, corresponding to an underexcited condition.
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