An aluminum wire with a diameter of 0.125 mm has a uniform electric field of 0.275 V/m imposed along its entire length. The temperature of the wire is 55.0°C. Assume one free electron per atom. (a) Use the information in this Table of Resistivities and Temperature Coefficients to determine the resistivity (in m) of aluminum at this temperature. P = ΩΜ (b) What is the current density (in MA/m²) in the wire? (c) J = MA/m² 2 What is the total current (in mA) in the wire? I = mA (d) What is the drift speed of the conduction electrons? V = μm/s (e) What potential difference must exist between the ends of a 2.10 m length of the wire to produce the stated electric field? AV = V
An aluminum wire with a diameter of 0.125 mm has a uniform electric field of 0.275 V/m imposed along its entire length. The temperature of the wire is 55.0°C. Assume one free electron per atom. (a) Use the information in this Table of Resistivities and Temperature Coefficients to determine the resistivity (in m) of aluminum at this temperature. P = ΩΜ (b) What is the current density (in MA/m²) in the wire? (c) J = MA/m² 2 What is the total current (in mA) in the wire? I = mA (d) What is the drift speed of the conduction electrons? V = μm/s (e) What potential difference must exist between the ends of a 2.10 m length of the wire to produce the stated electric field? AV = V
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