Science Models
Science Fair Projects

Published on Sep 05, 2023


The objective: Origanally my objective was to discover the difference in how electricity flows in open air and in a vacuum. However, I have expanded my objective after the Mendocino County Science Fair in order to test how electricity will flow in other atmospheres rather than just open air and inside a vacuum. My current objective is to discover how electricity will flow through different atmospheres including: open air, an empty vacuum, one filled with helium, and one filled with argon.


Tesla coil; 4 6-volt batteries (lantern batteries); Solid core hookup wire; Knife switch with screw connecters; 12-volt relay switch with soldering connecters;

Wells 12 volt automotive ignition coil; Soldering wire; Soldering tools; Alligator clips; Mounting board; Vacuum tube; 6 in long by 3 in diameter clear plastic tube; Vacuum pump; Copper tubing; Various sealing valves; Argon; Helium.


Electricity changes color in different atmospheres, and flows much farther in a vacuum than it does in open air. Results for how electricity flows in helium and argon are still pending and will be availible by the State Science Fair.


I concluded that electricity flows much farther in a vacuum than in open air (which disproved my hypothesis)due to the lack of molecules that restrict electric flow. In open air there are so many more molecules, they restrict the flow of electricity, thus electricity cannot flow as far.

At the county competition, judges recomended that various gases should also be tested in the vacuum chamber, so I decided to test helium and argon because they are more available.

Using a tesla coil to test electrial flow in open air, in an empty vacuum chamber, and one filled with Helium & Argon gases.

Science Fair Project done By Alexander J. Crawford