2. [/1 Points] SERPSE10 26.1.P.001.M|. ASK YOUR TEACHER PRACTICE ANOTHER A 350-km-long high-voltage transmission line 2.00 cm in diameter carries a steady current of 1,220 A. If the conductor is copper with a free charge density of 8.50 x 1028 electrons per 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.) :vr Need Help? 4. [-I1 Points] SERPSE10 26.1.0P.001. ASK YOUR TEACHER PRACTICE ANOTHER 2 carries a current of 4.50 A. The density of aluminum is 2.70 g/cm3. Assume each aluminum atom supplies one conduction electron per An aluminum wire having a cross-sectional area equal to 4.50 x 10'6 m atom. Find the drift speed of the electrons in the wire. :mm Need Help? 6. [-/1 Points] DETAILS SERPSE10 26.1.P.006. MY NOTES ASK YOU The figure below represents a section of a circular conductor of nonuniform diameter carrying a current of I = 4.60 A. The radius of cross-section A, is , = 0.520 cm. 12 A2 (a) What is the magnitude of the current density across A, ? A /m 2 The radius r, at A, is larger than the radius , at A1. (b) Is the current at A2 larger, smaller, or the same? O The current is larger. O The current is smaller. The current is the same. (c) Is the current density at A, larger, smaller, or the same? The current density is larger. O The current density is smaller. O The current density is the same. Assume A, = 3A1. (d) Specify the radius at A2. mmAssume A2 = 3A1. (cl) Specify the radius at A2. :mm (e) Specify the current at A2. :i A (f) Specify the current density at A2. :W 19. [/1 Points] DETAILS SERPSE10 26.A.OP.033. MY NOTES ASK YOUR TEACHER l PF An electric utility company supplies a customer's house from the main power lines (120 V) with two copper wires, each of which is 74.0 m long and has a resistance of 0.103 (2 per 300 m. (a) Find the potential difference at the customer's house for a load current of 101 A. E V (b) For this load current, find the power delivered to the customer. E w (c) Find the rate at which internal energy is produced in the copper wires. :W