Magnetism and electromagnetismQuestion 878 of 1506

A wire induces a voltage along its own length when the current through it changes. What is this effect called?

  1. Mutual induction
  2. Self-induction
  3. Saturation
  4. Retentivity
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Correct answer: Self-induction

The changing current changes its own magnetic field, which induces voltage in the same wire.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 14.5: Electromagnetic Induction

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Questions last reviewed: 18 October 2026