Question 123 4 5 67 8 9 10 11 12 Total -1 2:2 0/3 1/1 2/2 10/10 212 2/2 5/5 8/8

Question

Question 123 4 5 67 8 9 10 11 12 Total -1 2:2 0/3 1/1 2/2 10/10 212 2/2 5/5 8/8 2/2 2/3 3641(87.8%) Points ment Submission is assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer, ment Scoring ast submission is used for your score + -/1 points SerCP11 17 P.007.MI My Notes Ask Your Te 1028 electrons per A 280-km-long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1,190 A. If the conductor is copper with a free charge density of 8.5 cubic meter, how many years does it take one electron to travel the full length of the cable? (Use 3.156 x 107 for the number of seconds in a year.) yr Need Help? ReadIt O tol Master It + 2/2 points Previous Answers SerCP11 17.P017 My Notes Ask Your Te A potential difference of 11 V is found to produce a current of 0.44 A in a 3.6 m length of wire with a uniform radius of 0.37 cm. Find the following values for the wire: (a) the resistance 25 (b) the resistivity 2.98e-4 ·m Type here to search 3:50 P 2/15/20 ENG

Explanation / Answer

I = nAve

I = current, n = number density of electrons, v = drift velocity, e = electronic charge

=> 1190 = 8.5 x 1028 x (3.14 x (0.01)2) x v x 1.602 x 10-19

=> v = 2.781734336 x 10-4 m/s = 2.781734336 x 10-7 km/s

= 2.781734336 x 10-7 x 3.156 x 107 km/year = 8.779153565 km/year

time = distance/v = 280/8.779153565 = 31.8937353 year

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