Part 4. Effect of cross-sectional area. Table 3 Resistivity Length Area Resistance (0 cm) (cm) (cm?) (0) 0.50 10.00 1.50 0.50 10.00 3.00 0.50 10.00 4.50 0.50 10.00 6.00 0.50 10.00 7.50 0.50 10.00 9.00 0.50 10.00 10.50 0.50 10.00 12.00 0.50 10.00 13.50