posted by sofia .
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−8 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free carriers/cm3) in this Si crystal?
You are not allowed to post answers to exam problems. Collaboration of any form is strictly
forbidden in the midterms and the ﬁnal exams.
And I really hope that you and the other cheaters get kicked off the course. You deserve to be.