Conductivity describes how readily a material carries current, while the resistance of an object also depends on its geometry. The activity uses broad qualitative categories instead of invented precise resistance values for every sample. Graphite illustrates that some nonmetals conduct. Material identity is better evidence than surface colour, appearance or an object's everyday name.
Light, sound and electricity · Discover & try
Which materials complete an electrical path?
Reading level 4 of 5 · FluentChange
Word help
conductor
A material that allows charge to move relatively easily.
insulator
A material that strongly resists charge movement under the comparison conditions.
Watch · Try · Explain
See how it works
The interactive activity is loading.
Qualitative virtual sample comparison at fixed geometry; no household electrical testing.
What to look for
- Graphite is a conducting nonmetal
- Dry plastic resists current
- Appearance alone is not the test
Explain what you noticed
A wire has a copper core inside a dry-plastic jacket. Which part provides the main conducting path?
Keep this idea: Compare material properties under the same conditions.
Follow the sources
- NASA Goddard archive — All Things Electric and Magnetic: Electric Fluid
- U.S. Department of Energy — Electrical Science: Basic Electrical Theory
Source material checked 2026-10-28. Explanations and activities by Nepedia. Source links do not imply endorsement.
Keep following the idea
Next discovery →