Hi, the today definition of electric current says it is done by moving electrons. But this wikipedia article https://en.wikipedia.org/wiki/Speed_of_electricity says: "the signals or energy travel as electromagnetic waves typically on the order of 50%–99% of the speed of light, while the electrons themselves move (drift) much more slowly." "AC voltages cause no net movement; the electrons oscillate back and forth in response to the alternating electric field" This comment about AC voltages remember us that the inventor of the AC induction motor, Tesla, didn't believe in the existence of the electron https://en.wikipedia.org/wiki/Nikola_Tesla#On_experimental_and_theoretical_physics In order to prove or disprove the existence of electrons in electric current I searched the internet if the discharged plate of a capacitor lose mass and if a charged plate of a capacitor gain mass. The experiment was never made. The mass is considered negligible but we have to measure it to show that electricity is an actual movement of electron (it should be feasible with today instruments and a big capacitor to have lot of electron involved) Additional info : _how the notion of electron was accepted https://www.nobelprize.org/educational/physics/vacuum/experiment-1.html _formula to evaluate electron speed https://en.wikipedia.org/wiki/Drift_velocity "Therefore in this wire the electrons are flowing at the rate of 23 µm/s. At 60 Hz alternating current, this means that within half a cycle the electrons drift less than 0.2 μm. In other words, electrons flowing across the contact point in a switch will never actually leave the switch."