75. (a) The magnitude of the current density vector is ()( )2312274 60.0V4V0.1270.7292.60 10 m1.32 10 A m .AiVJARRRD2−====++ππΩ+Ω×=×(b) VA= V R1/(R1+ R2) = (60.0 V)(0.127 Ω)/(0.127 Ω+ 0.729 Ω) = 8.90 V. (c) The resistivity of wire Ais 2328(0.127)(2.60 10 m)1.69 10m .44(40.0m)AAARALLπρ−−==×
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The Current, Electrical conductivity, current density, Lp space, current density vector