In the circuit shown, two thick copper wires connect a 1.5 V battery to a Nichrome wire. Each copper wire has radius R = 9 mm and is L=17cm long.Copper has 8.4×10^28 mobile electrons per cubic meter and an elec- tron mobility of 4.4 × 10^-3 (m/s)/(V/m). The Nichrome wire is l =6 cm long and has radius r=1 mm.3 Nichrome has 9 × 1028 mobile electrons/m and an electron mobility of 7 × 10^-5 (m/s)/(V/m). What is the magnitude of the electric field in the copper wire?