일반물리학 2 — Current and Resistance: Problem 4

4 In Fig. 26-15a, a 9.00 V battery is connected to a resistive strip that consists of three sections with the same cross-sectional areas but different conductivities. Figure 26-15b gives the electric potential \(V(x)\) versus position \(x\) along the strip. The horizontal scale is set by \(x_s = 8.00\text{ mm}\). Section 3 has conductivity \(4.00 \times 10^7 (\Omega \cdot \text{m})^{-1}\). What is the conductivity of section (a) 1 and (b) 2?