PH212 Lecture Notes - Lecture 13: Electric Current, Electric Field, Drift Velocity
25 Dec 2018
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Document Summary
Exists where there is charge movement; the rate at which charge passes through a wire in time t. Dt = dq/i = 1. 67 c / 0. 835 a = 2. 00 s. They can be any; however, conventional current is defined as current consisting of positive charge that has the same effect as motion of actual charge carriers. Create a force which sets charges in motion. For a material to be a good conductor, charge carriers must be able to move easily. Because the electric field travels at the speed of light; the charges actually travel very slowly. In electrostatic equilibrium electrons move in a conductor move randomly. This force sets the electrons in motion which then creates a current. The average energy gained by the electrons as they are accelerated by the electric field is greater than the average lost in energy due to the collisions.
