An aluminum wire with a diameter of 0.095 mm has a uniform electric field of 0.225 V/m imposed along its entire length. The temperature of the wire is 45.0° C. Assume one free electron per atom.
(a) Use the information in this Table of Resistivities and
Temperature Coefficients to determine the resistivity of aluminum
at this temperature.
ρ = Ω·m
(b) What is the current density in the wire?
J = MA / m2
(c) What is the total current in the wire?
I = mA
(d) What is the drift speed of the conduction electrons?
vd = µm/s
(e) What potential difference must exist between the ends of a
1.90-m length of the wire to produce the stated electric
field?
ΔV = V
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