cathode
Electron exit point
A cathode is the negative electrode in an electrical device—the terminal where current flows out.
In a battery, electrons flow from the cathode through an external circuit.
In a cathode ray tube (the technology behind old televisions), electrons stream from the cathode toward a screen.
The opposite terminal is the anode.
Current-induced ionic separation
- electrodepositionCoating surfaces using electricity
- reductionMaking something smaller
- oxidationLosing electrons chemically
- ionCharged atom or molecule
cation · electron · plating · copper · silver · gold · zinc · nickel
Directed flow of charge
- circuitClosed electrical pathway
- voltageElectrical potential difference
- amperageElectrical flow quantity
- resistanceCapacity to withstand force
conductor · discharge · charge · power · load · rectifier · semiconductor · conduction
Heat-emitted electron phenomenon
- emissionDischarged substance or act
- filamentVery thin thread
- heaterDevice producing warmth
- phosphorLight-emitting coating substance
fluorescence · CRT · Braun · oscilloscope · television · screen · deflection · grid
electrolysis
Current-induced ionic separation
- electrodepositionCoating surfaces using electricity
- reductionMaking something smaller
- oxidationLosing electrons chemically
ion · cation · electron · plating · copper · silver · gold · zinc · nickel · chromium
current
Directed flow of charge
- circuitClosed electrical pathway
- voltageElectrical potential difference
- amperageElectrical flow quantity
resistance · conductor · discharge · charge · power · load · rectifier · semiconductor · conduction · polarity
thermionic
Heat-emitted electron phenomenon
phosphor · fluorescence · CRT · Braun · oscilloscope · television · screen · deflection · grid · triode
terminal
At the endpoint
- cellBasic unit of life
- batteryPortable electricity storage
- electrolyteConductive dissolved substance
galvanic · voltaic · electrochemical · circuit · polarity · negative · positive · lead-acid · lithium · nickel-cadmium
- cathodes
- copper miningcopper ore, copper production, smelting, refining, open pit
- Electrodesmicroelectrode
- electricityelectricity, battery, batteries, wire, wires
- conductorscopper wire, gold wire, silver wire, aluminum, platinum
- chemistryatom, atoms, organic chemistry, molecule, chemistry
- cathode ray tubeElectron-beam display device
- cathode-ray tubeVacuum tube display device
- cathode rayElectrons emitted in vacuum tubes
- cold cathodeElectrode emitting without heat