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(16 points) Copper has 8.5 x 1023 free electrons per cubic meter. A segment of copper wire that has a length of 45 cm and cross-sectional radius of 1.1 mm carries a current of 4.8 A. (a) Calculate the drift velocity of electrons in the wire. 9. (b) Calculate the average time i tkes for an electron to dfift through the wire segment. (Area of a circle A m2, where r is the radius)
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