Question

A 14.0 gauge copper wire of diameter 1.628 mm carries a current of 15.0 mA Part A What is the potential difference across a 2.25 m length of the wire? EVO AED ? V Submit Request Answer Part B What would the potential difference in part A be if the wire were silver instead of copper, but all else was the same? IVO AED h ? V Submit Request Answer

Answer 1

Resistivity P = 1.72 x 108 Diameter of wire : 1.628 mm 1.628 x 103 meter ad current through wire : I 15mA = 15 x 10 3 Ampere of Copper ohm - Meter Length to be taken 2-25 meter as we know Resistance R = Pl A =) R = 1.72 x 108 x 2.25 11.628 X 16-3)? R = 1.86x10-252 Pe 4 Now Potential differece = v=IR V - 158103 x 1.86 x 10-2 27.887 X los Volt (6) Resistivity of Silver P = 1.59xió -8 ohm-meter similary, R Pl A Pe Ind!) "x 2.25 RE 1.59 x 10 8 (1-628x/0+32 - R = 1.718 x 10 2 Potential dibt. VFR 15.103 x 1-718x102 25.779 x los volt!