http://sites.science.oregonstate.edu/portfolioswiki/ 2020-01-26T22:59:53-08:00 http://sites.science.oregonstate.edu/portfolioswiki/ http://sites.science.oregonstate.edu/portfolioswiki/lib/images/favicon.ico text/html 2012-07-12T12:33:38-08:00 http://sites.science.oregonstate.edu/portfolioswiki/whitepapers:current:start?rev=1342121618 Student Understanding of Current by Len Cerny What's the Problem? At first it may seem as if a concept as simple as current, measured as charge per unit time, would be entirely unproblematic for upper-division physics students. However, nearly all of our incoming juniors have an incompletely developed understanding of current. Here are some of the things students often do not thoroughly understand as they enter upper-division courses: