The electrode through which electrical current flows into a device or material, typically represented by a negative charge.
The word cathode is derived from the greek word kathodos, which means way down, and refers to the electrode through which electrical current flows into a device or material.
- The cathode is negatively charged and the anode is positively charged.
- Cathode rays are streams of electrons emitted from the cathode in a vacuum tube.
- In a cathode ray tube, the cathode is the electron gun that emits electrons.
- Cathode ray tubes are used in old televisions and computer monitors.
- Cathodes can be made of different materials such as metals or semiconductors.