TransformersQuestion 1100 of 1506

What does the dot convention show on a transformer schematic?

The relative polarity of the winding ends
Which winding has the higher current rating, relative to the others
Which winding is connected to ground, relative to the others
The number of turns in each winding, relative to the core

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Correct answer: The relative polarity of the winding ends

The dots mark like polarity between the windings. They do not give ratings or turns.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 10.4: Phasing

Questions last reviewed: 18 October 2026

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