chp29_1 - PHY2061 R. D. Field Charge Transport and Current...

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PHY2061 R. D. Field Department of Physics chp29_1.doc University of Florida Charge Transport and Current Density Consider n particles per unit volume all moving with velocity v and each carrying a charge q . The number of particles, N , passing through the ( directed ) area A in a time t is ∆∆ Nn v A t =⋅ r r and the amount of charge, Q , passing through the ( directed ) area A in a time t is Q nqv A t r r . The current , I(A) , is the amount of charge per unit time passing through the ( directed ) area A : IA Q t nqv A J A () r r r r r == = , 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.

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