Red Seal Electrician Practice
Wiring and componentsQuestion 793 of 1506

Graphite and diamond are both made of carbon. How do they differ in conduction?

  1. Graphite is a fair conductor and diamond is practically an insulator
  2. Both are good conductors
  3. Diamond is a better conductor than graphite
  4. Both are good insulators and are made of different atoms
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Correct answer: Graphite is a fair conductor and diamond is practically an insulator

The same atoms in a different structure give very different conductivity.

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