The Basic lessons · Basic electronics and theory · B-005-002

Conductors, Insulators, and the Flow of Electricity

This lesson explains how different materials control the flow of electric charge and defines the key terms used to describe that movement. You will learn why some substances let electricity pass easily while others stop it, and how temperature affects this behaviour.

This lesson is part of SignalPrep Pro. The subsection's 11 exam questions are free to practise: practise B-005-002.

What this subsection asks

• Which of these groups lists three good electrical conductors?
• Which of these groups lists three good electrical insulators?
• What do we call the flow of electric charge in a circuit?
• What is the best conductor among the following materials?
• Which of these types of materials readily allows the flow of electric current?
• What electrical property causes an object to conduct electricity very well?
• The letter "R" is the symbol for:
• What is the inverse of resistance?
• What is a voltage drop?
• The resistance of a conductor changes with:
• Which term describes the direction of current in a DC circuit?