Definition
A measure of how readily a material allows electric current to flow through it. Materials with high electrical conductivity (such as aluminum and copper) carry current with little resistance, while materials with low conductivity (such as composites, rubber, or dry wood) resist the flow of current.
Plain English
How easily electricity can move through a material. Some materials let it pass through with almost no trouble; others block it.
Context Anchor
Seen in discussions of lightning strike protection, especially when comparing metal aircraft structures with composite structures that may need added conductive material.
Derivation
From the Latin 'conducere,' meaning 'to lead or bring together.' A material with high conductivity 'leads' electricity through itself easily.
Why Pilots Care
High-conductivity materials on the aircraft exterior let lightning current travel safely across the skin and exit without damaging structure or systems.
Analogy
Think of electricity like water trying to move through a surface. A highly conductive material is like an open channel; a poorly conductive material is more like a blocked path where pressure and damage can build up.
Grounding Statement
During a lightning strike, the aircraft needs a way for the electrical energy to spread out and move away rather than staying concentrated at one point.
Intuition Check
Electrical conductivity does not mean a material makes electricity. It means the material allows electricity to pass through it easily.
Example Sentence 1
Aluminum's high electrical conductivity allows a lightning strike to travel along the skin of the aircraft rather than through the cabin.
Example Sentence 2
Engineers add conductive mesh to composite panels to raise their electrical conductivity and meet lightning protection standards.