Wiring and componentsQuestion 796 of 1506

Which material has no electrical resistance at all?

  1. Silicon carbide
  2. Graphite
  3. A superconductor
  4. Copper
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Correct answer: A superconductor

Superconductors have zero resistance but need special conditions.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 12.1: 12.1 Introduction to Conductance and Conductors

Practice wiring and components

Questions last reviewed: 18 October 2026