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As I understand it, the cathode is where electrons "leave", the anode is where they "enter". In case of a battery, electrons leave the minus side. But for a dev
by derkades 4y ago
As I understand it, the cathode is where electrons "leave", the anode is where they "enter". In case of a battery, electrons leave the minus side. But for a device being powered, electrons enter the minus side.
- HPsquared 4y agoI always remember it by thinking about a cathode ray tube - on that, the flying electrons are called "cathode rays", i.e. the cathode shoots out the electrons that came in from the external connection. The power supply pushes electrons into the "cathode" terminal on the device. That is, "positive current" flows out of the cathode (in the opposite direction to the electrons).