Current per unit cross-sectional area is known as current density. It is expressed in amperes per square meter or fractions thereof. Current density can also be expressed in amperes per circular mil. The greater the current in a conductor, the higher the current density.
For ease of calculation let's say you have square electrodes that measure 1 mm each side and are 100 mm in length. The surface area them will measure 1mm x 100mm x 4 sides = 400 mm^2 (400 square mm). If you pass a current of 400 mA through this electode, the CURRENT DENSITY can be found by dividing the current by the area (400 mA / 400 mm^2) and will equal 1 mA / mm^2 (one mA per square mm) The above calculation is for a single elecrode. Most use 2 so to get the actual current density of your setup you will need to divide the calculated current density by 2 which would give a current density of 500 uA per mm^2. Regards, George Martin =>Could you please explain. That is a term that i have never heard of before. =>Thanks =>Damian -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
