DC circuitsQuestion 537 of 1506

A wire at normal temperature is carrying current. What does the friction of electron movement produce?

  1. A magnetic field only
  2. Wear that thins the wire
  3. Heat in the conductor
  4. Static charge
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Correct answer: Heat in the conductor

Electrons meet some friction, which creates heat.

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

Practice dc circuits

Questions last reviewed: 18 October 2026