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20: Electric Current, Resistance, and Ohm's Law

Thumbnail: Electrons flowing in a metal according to Drude model with electrons (shown here in blue) constantly bouncing among heavier, stationary crystal ions (shown in red). Image used with permission (CC-BY-SA 3.0, Rafaelgarcia).


  • Paul Peter Urone (Professor Emeritus at California State University, Sacramento) and Roger Hinrichs (State University of New York, College at Oswego) with Contributing Authors: Kim Dirks (University of Auckland) and Manjula Sharma (University of Sydney). This work is licensed by OpenStax University Physics under a Creative Commons Attribution License (by 4.0).