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- Cathode abstract "A cathode is the electrode from which a conventional current leaves a polarized electrical device. This definition is sometimes remembered using the mnemonic CCD for cathode current departs. A conventional current describes the direction in which positive electronic charges move. Electrons have a negative charge, so the movement of electrons is opposite to the conventional current flow. Consequently, the mnemonic cathode current departs also means that electrons flow into the device's cathode.Cathode polarity with respect to the anode can be positive or negative; it depends on how the device operates. Although positively charged cations always move towards the cathode (hence their name) and negatively charged anions move away from it, cathode polarity depends on the device type, and can even vary according to the operating mode. In a device which takes energy (such as recharging a battery), the cathode is negative, and in a device which provides energy (such as discharging a battery), the cathode is positive: In a discharging battery or a galvanic cell, the cathode is the positive terminal since that is where the current flows out of the device (see drawing). This outward current is carried internally by positive ions moving from the electrolyte to the positive cathode (chemical energy is responsible for this \"uphill\" motion). It is continued externally by electrons moving inwards, this negative charge moving inwards constituting positive current flowing outwards. For example, the Daniell galvanic cell's copper electrode is the positive terminal and the cathode. In a recharging battery, or an electrolytic cell performing electrolysis, the cathode is the negative terminal, from which current exits the device and returns to the external generator. For example, reversing the current direction in a Daniell galvanic cell would produce an electrolytic cell, where the copper electrode is the positive terminal and the anode. In a diode, the cathode is the negative terminal at the pointed end of the arrow symbol, where current flows out of the device. Note: electrode naming for diodes is always based on the direction of the forward current (that of the arrow, in which the current flows \"most easily\"), even for types such as Zener diodes or solar cells where the current of interest is the reverse current. In vacuum tubes (including cathode ray tubes) it is the negative terminal where electrons enter the device from the external circuit and proceed into the tube's near vacuum, constituting a positive current flowing out of the device.An electrode through which current flows the other way (into the device) is termed an anode.".
- Cathode thumbnail Copper_cathode_2.svg?width=300.
- Cathode wikiPageExternalLink anode-cathode.htm.
- Cathode wikiPageExternalLink www.crtsite.com.
- Cathode wikiPageID "6944".
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- Cathode wikiPageRevisionID "703131703".
- Cathode wikiPageWikiLink Alkali_metal.
- Cathode wikiPageWikiLink Alternating_current.
- Cathode wikiPageWikiLink Anode.
- Cathode wikiPageWikiLink Barium.
- Cathode wikiPageWikiLink Battery_(electricity).
- Cathode wikiPageWikiLink Category:Electrodes.
- Cathode wikiPageWikiLink Cathode_bias.
- Cathode wikiPageWikiLink Cathode_ray_tube.
- Cathode wikiPageWikiLink Chemistry.
- Cathode wikiPageWikiLink Cold_cathode.
- Cathode wikiPageWikiLink Crookes_tube.
- Cathode wikiPageWikiLink Daniell_cell.
- Cathode wikiPageWikiLink Diode.
- Cathode wikiPageWikiLink Dipole.
- Cathode wikiPageWikiLink Electric_current.
- Cathode wikiPageWikiLink Electric_field.
- Cathode wikiPageWikiLink Electrical_polarity.
- Cathode wikiPageWikiLink Electrochemical_cell.
- Cathode wikiPageWikiLink Electrochemistry.
- Cathode wikiPageWikiLink Electrode.
- Cathode wikiPageWikiLink Electrode_potential.
- Cathode wikiPageWikiLink Electrolysis.
- Cathode wikiPageWikiLink Electrolyte.
- Cathode wikiPageWikiLink Electrolytic_cell.
- Cathode wikiPageWikiLink Electron.
- Cathode wikiPageWikiLink Electron_microscope.
- Cathode wikiPageWikiLink Electronics.
- Cathode wikiPageWikiLink Field_electron_emission.
- Cathode wikiPageWikiLink Fluorescent_lamp.
- Cathode wikiPageWikiLink Frequency.
- Cathode wikiPageWikiLink Galvanic_cell.
- Cathode wikiPageWikiLink Gas-discharge_lamp.
- Cathode wikiPageWikiLink Gas-filled_tube.
- Cathode wikiPageWikiLink Geomagnetic_reversal.
- Cathode wikiPageWikiLink Greek_language.
- Cathode wikiPageWikiLink Image_intensifier.
- Cathode wikiPageWikiLink Incandescent_light_bulb.
- Cathode wikiPageWikiLink Ion.
- Cathode wikiPageWikiLink List_of_chemistry_mnemonics.
- Cathode wikiPageWikiLink Michael_Faraday.
- Cathode wikiPageWikiLink Mnemonic.
- Cathode wikiPageWikiLink Neon_lamp.
- Cathode wikiPageWikiLink Neon_lighting.
- Cathode wikiPageWikiLink N–doped.
- Cathode wikiPageWikiLink Photoelectric_effect.
- Cathode wikiPageWikiLink Phototube.
- Cathode wikiPageWikiLink Physics.
- Cathode wikiPageWikiLink Polarity_(physics).
- Cathode wikiPageWikiLink Poly(3,4-ethylenedioxythiophene).
- Cathode wikiPageWikiLink P–n_junction.
- Cathode wikiPageWikiLink Redox.
- Cathode wikiPageWikiLink Refractory_metals.
- Cathode wikiPageWikiLink Secondary_emission.
- Cathode wikiPageWikiLink Semiconductor_device.
- Cathode wikiPageWikiLink Solar_cell.
- Cathode wikiPageWikiLink Solenoid.
- Cathode wikiPageWikiLink Strontium.
- Cathode wikiPageWikiLink Thermionic_emission.
- Cathode wikiPageWikiLink Thorium.
- Cathode wikiPageWikiLink Thyratron.
- Cathode wikiPageWikiLink Triode.
- Cathode wikiPageWikiLink Tungsten.
- Cathode wikiPageWikiLink Vacuum_tube.
- Cathode wikiPageWikiLink William_Whewell.
- Cathode wikiPageWikiLink Work_function.
- Cathode wikiPageWikiLink X-ray_generator.
- Cathode wikiPageWikiLink Zener_diode.
- Cathode wikiPageWikiLink File:4-1000A_linear_RF_deck_build_by_K5LAD.jpg.
- Cathode wikiPageWikiLink File:Copper_cathode_2.svg.
- Cathode wikiPageWikiLink File:Diode_symbol.svg.
- Cathode wikiPageWikiLink File:Neon_lamp_on_DC.JPG.
- Cathode wikiPageWikiLink File:Triode_schematic_labeled.svg.
- Cathode wikiPageWikiLinkText "(cathode)".
- Cathode wikiPageWikiLinkText "Cathode".
- Cathode wikiPageWikiLinkText "cathodal".
- Cathode wikiPageWikiLinkText "cathode".
- Cathode wikiPageWikiLinkText "cathodic".
- Cathode wikiPageWikiLinkText "cathodically".
- Cathode wikiPageWikiLinkText "negative".
- Cathode align "right".
- Cathode caption "Cutaway view of a triode vacuum tube with an indirectly-heated cathode , showing the heater element inside".
- Cathode caption "Two indirectly-heated cathodes in ECC83 dual triode tube".
- Cathode direction "horizontal".
- Cathode image "Dubulttriode darbiibaa.jpg".
- Cathode image "Triode-english-text.svg".
- Cathode width "137".
- Cathode width "170".
- Cathode wikiPageUsesTemplate Template:Div_col.
- Cathode wikiPageUsesTemplate Template:Div_col_end.
- Cathode wikiPageUsesTemplate Template:Galvanic_cells.
- Cathode wikiPageUsesTemplate Template:Main.
- Cathode wikiPageUsesTemplate Template:Multiple_image.