PHY 2020 Lecture Notes - Lecture 32: Electromotive Force, Drift Velocity, Electric Current
Document Summary
To observe examples of electromotive force (battery!) and circuits to learn the application of ohm"s law. To calculate the energy and power in electric circuits. To study the similarity and differences in the combination of resistors in parallel and those connected in series. To apply kichhoff"s rules to combinations of resistors. To observe and understand devices which measure electricity in circuits. To combine resistors and capacitors then calculate examples of the results. What a net charge q passes through a cross section of conductor during time t, the current is: The current is defined in the direction positive would flow. A conventional current is treated as a flow of positive charges, regardless of whether the free charges in the conductor are positive, negative, or both. In a metallic conductor, the moving charges are electrons- but the current still points in the direction positive charges would flow.
