A wire with a square cross section of side length 1.5mm has a constant current density J = 15A/m^2. (a) What is the tota

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A wire with a square cross section of side length 1.5mm has a constant current density J = 15A/m^2. (a) What is the tota

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A wire with a square cross section of side length 1.5mm has aconstant current density J = 15A/m^2.(a) What is the total current in the wire? (b) If the driftvelocity of the electrons in this system is18.73 m/s, what is the free charge density?
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