Wiring and componentsQuestion 899 of 1506

The magnetic field of an inductor on a circuit board can extend beyond it. What problem can this cause?

  1. It makes nearby resistors lose their value over time
  2. Unwanted mutual inductance
  3. It raises the DC voltage on the board
  4. It reduces the rated current of the inductor
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Correct answer: Unwanted mutual inductance

If the fields link with other turns, mutual inductance appears in addition to self-inductance.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 15.5: Practical Considerations - Inductors

Practice wiring and components

Questions last reviewed: 18 October 2026