Red Seal Electrician Practice
DC circuitsQuestion 357 of 1506

What do all sources of EMF have in common?

  1. They create new electrons from other matter at the terminal
  2. They separate charge, leaving a surplus of electrons at one terminal
  3. They strip all the protons away from the atoms involved
  4. They are able to produce only alternating voltage output
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Correct answer: They separate charge, leaving a surplus of electrons at one terminal

A source converts another form of energy to electrical energy by separating charge.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 1.1: Basic principles

Practice dc circuits

Questions last reviewed: 18 October 2026