If there is a semiconducting shell with negatively charged electrons and a material inside the shell with positively charged holes, the material has a radius no greater than the inner radius of the shell, how can i find the current in a semiconductor given that i know the electron current density and the hole current density?
2006-10-07 09:26:14 · 3 answers · asked by thomthum2000 2 in Science & Mathematics ➔ Physics
the shell is a cylindrical shell
2006-10-07 09:28:07 · update #1
the length of the cylinder isn't known
2006-10-07 10:06:22 · update #2
Current density is total current divided by area. You must know the area of the material to get total current from current density. The total current will be the sum of the electron current and the hole current.
2006-10-07 09:54:40 · answer #1 · answered by gp4rts 7 · 0⤊ 0⤋
In the n type material the charge carriers are electrons, in the p type material the charge carriers are holes. the device you describe would be a diode, the hole current and the electron current will be equal. Current density is indeed current devided by area, so the current will be the current density times the area.
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/ohmmic.html
2006-10-07 17:56:45 · answer #2 · answered by horse 2 · 0⤊ 0⤋
complicated situation. try searching at yahoo or google. it might help!
2014-11-15 04:18:22 · answer #3 · answered by Anonymous · 0⤊ 0⤋