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What is the drift velocity of electrons in a 12-gauge copper wire (which has a diameter of 2.053 mm) carrying a 10.0-A current, given that there is one free electron per copper atom. (Household wiring often contains 12-gauge copper wire, and the maximum current allowed in such wire is usually 20 A.) The density of copper is . 8.8x103 Kg/m3. O -4.53 x 104 m/s O -2.27 x 10-4 m/5 O 4.53 x 104 m/5 O 2.27 x 104 m/s