What is the current I through the conductor at time 5.0 seconds?

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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An aluminum "12 gauge" wire has a diameter d of 0.205 centimeters. The resistivity ρ of aluminum is 2.75×108 ohm-meters. The electric field in the wire changes with time as E(t)=0.0004t2 -0.0001t + 0.0004 newtons per coulomb, where time is measured in seconds.
 
What is the current I through the conductor at time 5.0 seconds?
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