Passage II
Resistivity is the tendency of a material to oppose the flow of an electric current, whereas conductivity is the ability of a material to carry an electric current. Table 1 lists, for each of 12 metals at the same temperature, the density (in grams per cubic centimeter, g/cm3), resistivity (in ohm meters, Ω∙m), and conductivity (in siemens per meter, S/m). Figure 1 shows, for 3 of these metals, how resistivity varies with temperature (in kelvins, K).
8. According to Figure 1, at a temperature of 600 K, which of calcium, aluminum, and gold has (have) a resistivity greater than 7 × 10-8 Ω∙m ?
Your Answer is
Correct Answer is F
Explanation
Look at figure 1, when the abscissa is 600 K, only calcium has a resistance greater than 7×10-8 in the ordinate