Electric arc and Electrical conduction

Electric arc noun - Electrical conduction through a gas in an applied electric field.

Electrical conduction and electric arc are semantically related. In some cases you can use "Electrical conduction" instead a noun phrase "Electric arc".

Electrical conduction noun - The passage of electricity through a conductor.

Electric arc and electrical conduction are semantically related. Sometimes you can replace phrase "Electric arc" with "Electrical conduction", this phrases are similar.