Question

13) A current of 5.0 x 10'10 A exists in a copper wire whose diameneng the curret a charge carriers per unit volume calculate the electron drift speed is 2.3 mm. The number of is 8.49 10 m. Assuming the current is uniform, m A) 44x101s m/s B) 2.2x10 m/s C) 3.8x10 m/s D) 8.9x101 m/s 14) Awire is 1.4 m long and 0.75 mm2 in cross-sectional area. Itcarries acconductivityơof the current of 3.4 A when ity ơ of the a 2.2 V potential difference is applied between its ends. material of which this wire is made. Calculate the A) 2.9 x 10+6 n-1.m-1 B) 1.9 x 10-2 01.m-1 C) 5.8 x 10-in-1,Tn-1 D) 0.8 x 103 -1.m- 15) An 18.2 W device has 9.00 V across it. How much charge goes through the device in 4.26 A) 516.9 C B) 31.0 x 10 c C) 18.6 x 10 C D) 15.5 x 10°C 16) The current-voltage graphs of three wires are shown in the figure below. Rank the according to their resistance, greatest first. Wire 2 Ri,R2, R3 Wir R2, R3, Ri, Ri, R3, R2, D) Rj, R2, Ri

Answer 1