If you ever saw an electric rail engine, then you must observe that the engine takes power from the overhead wires with Pantograph. So the question arises, what is Pantograph?
How Does Electric Locomotive Work?, Pantograph Train how it works
Did you know: Some trains have wings on their pantograph! (More in comments) : r/trains
Energies, Free Full-Text
Indian locomotive class WAG-12 - Wikipedia
Does anyone know how to change the pantograph on Lionel's New York Central S1or S2 electric engine
Pantograph, Locomotive Wiki
How does an electric train run with only 1 wire? - Quora
Locomotive - Wikipedia
Pantograph–catenary electrical contact system of high-speed railways: recent progress, challenges, and outlooks
What is the difference between a battery-electric locomotive and a regular electric train fleet? - Quora