TransformersQuestion 1067 of 1506

In a transformer, which winding is connected to the AC source?

  1. The secondary winding
  2. The tertiary winding
  3. The primary winding
  4. The core winding
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Correct answer: The primary winding

The powered coil is the primary. The coil that feeds the load is the secondary.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 10.1: Mutual Inductance and Basic Operation

Practice transformers

Questions last reviewed: 18 October 2026