A rod of semiconducting material of length L 2 m and cross-sectional area A- 4.5 mm lies along the x-axis between z 0 and z - L The material obeys Ohm's lawi, and its resistivity varies along the rod according to p- p (1- where p- 4 x 10 n-m. The end of the rod at z- 0 is at a potential V - 15 V greater than the end at z- L L2 D) What is the electric-field magnitude E, in units of V/m, in the rod at L/2? Answer.

A rod of semiconducting material of length L 2 m and cross-sectional area A- 4.5 mm lies along the x-axis between z 0 and z - L The material obeys Ohm's lawi, and its resistivity varies along the rod according to p- p (1- where p- 4 x 10 n-m. The end of the rod at z- 0 is at a potential V - 15 V greater than the end at z- L L2 D) What is the electric-field magnitude E, in units of V/m, in the rod at L/2? Answer.