Wire C and wire D are made from different materials and have length `L_C = L_D= 1.0 m.` The resistivity and radius of wire C are `2.0 xx 10^(-6). Omega m` and 1.00 mm, and those of wire D are `1.0 xx 1.0^(-6)Omega. m`. and 0.50 mm. The wires are joined as shown in Fig. 26-25, and a current of 2.0 A is set up in them. What is the electric potential difference between a) points 1 and 2 and (b) points 2 and 3? What is the rate at which energy is dissipated between c) points 1 and 2 and (d) points 2 and 3?

Answer

(a) 1.3 V; (b) `2.546 approx 2.5V; (c) 2.5 W; (d) 5.1W`