Find the number density of free charges in the wire

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Reference no: EM13672995

A wire made from copper with a cross-section of diameter 0.890 millimeter carries a current of 13.0 Amp. Determine the "areal current density"; in other words, determine how many electrons per square meter per second flow through this wire?

The density of copper is 8.92g/cm³, and its atomic mass is 64.0. Assuming each copper atom contributes one mobile electron to the metal, find the number density of free charges in the wire, in electrons/m3?

Due to thermal motion, the electrons at room temperature are randomly traveling to and fro at1.12 × 10⁵ m/s, even without any current. Find what fraction is the current drift speed, compared to the random thermal motion?

Reference no: EM13672995

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