DC circuitsQuestion 533 of 1506

What is a material with many free electrons called?

  1. An insulator
  2. A conductor
  3. A semiconductor only
  4. A magnet
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Correct answer: A conductor

High electron mobility means a conductor.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 1.2: Conductors, Insulators, and Electron Flow

Practice dc circuits

Questions last reviewed: 18 October 2026