In the circuit shown, two thick copper wires connect a 1.5 V battery to a Nichrome wire. Each copper wire has radius R = 8 mm and is L = 17 cm long. Copper has 8.4 × 10 28 mobile electrons per cubic meter and an electron mobility of 4.4×10 −3 (m/s)/(V/m). The Nichrome wire is l = 7 cm long and has radius r = 3 mm. Nichrome has 9 × 1028 mobile electrons/m3 and an electron mobility of 7 × 10−5 (m/s)/(V/m). What is the magnitude of the electric field in the copper wire?
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