An aluminum wire with a diameter of 0.105 mm has a uniform electric field of 0.265 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
2.50-m length of the wire to produce the stated electric
field?
ΔV =...... V
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