Question

A 6.00-m length of 2.2-mm-diameter wire carries a 810 mA current when 23.0 mV is applied to its ends. Determine the resistivity p. Express your answer to two significant figures and include the appropriate units. HÄ ? u 2 % Å p= Value Units The unit you entered is not recognized. Review a list of acceptable units. No credit lost. Try again. Submit Previous Answers Request Answer Part C If the drift speed is 1.8 x 10 m/s, determine the number n of free electrons per unit volume. Express your answer using two significant figures. VO AEO ? 72= electrons m3

Answer 1

DELTA Pg No PARTB Delermine the resistivity e. wire l=6m Length of diameter d = 2.2mm = 2,2x103 m Abblied voltage v= 23 mv = 23x10?v Current I=810x15%A P RA -cis from ohn's Law v=IR =REV - 23x8 810x103 R = 0.0280 A = Igt= = 1$= 3.14*121 271033? A = 3.88156 m² 6 0.028 X 3.8x106 = 0.0177 Xiös or p = 1.8x10 nem n = PARTE Drift speed Va = 1.8x10 m/s I = neava I 3 810X10 eava NG xid9 x 3.8x106x18x105 27 n = 810 X 10 70.94 27 74 X10 electrons WP