Red Seal Electrician Practice
Magnetism and electromagnetismQuestion 895 of 1506

Why do inductor designers keep the core flux density away from saturation?

  1. So the core can store extra energy as heat
  2. So the permeability can fall to zero in the core
  3. So the coil can work only with DC supplies
  4. So inductance stays steadier as current changes
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Correct answer: So inductance stays steadier as current changes

Near saturation, the permeability and so the inductance vary with current.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 15.3: Factors Affecting Inductance

Practice magnetism and electromagnetism

Questions last reviewed: 18 October 2026