{1) Two grinsdricel rods? one copper and the other iron: are identical in lengths and crosssectional areas. Theyr are joined end to end to form one long.r rod. A 12? better}? is connected across the free ends of the copperiron rod. What is the voltage between the ends of the copper ro-d'.'r Resistii'ities of copper and iron are respectively: 1.1? x 1135 (1m and 9'. 'x' KID5:1