PHY2061 R. D. Field Department of Physics chp29_1.doc University of Florida Charge Transport and Current Density Consider nparticles per unit volume all moving with velocity vand each carrying a charge q. The number of particles, ∆N, passing through the (directed) area Ain a time ∆tis ∆∆NnvAt=⋅rrand the amount of charge,∆Q, passing through the (directed) area Ain a time ∆tis Qnqv A trr. The current, I(A), is the amount of charge per unit time passing through the (directed) area A: IAQtnqv AJ A()rrrrr==⋅=⋅∆∆, where the
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This note was uploaded on 05/31/2011 for the course PHY 2061 taught by Professor Fry during the Spring '08 term at University of Florida.