(Solved): the fotlowing table.) (a) All values at \( 20^{\circ} \mathrm{C} \). All elements in this table ar ...

the fotlowing table.) (a) All values at \( 20^{\circ} \mathrm{C} \). All elements in this table are assumed to be free of impurities. (b) See the section "Resistance and Temperature". (c) A tickel-chromium alloy commonly used in heating elements. The resistivity of Nichrome varies weh composition and ranges between \( 1.00 \times 10^{-6} \) and \( 1.50 \times 10^{-6} 0 \) - 7 . (d) The resistivity of slicon is very sensitive to purity. The value can be changed by several orders of mognitude when it is doped with other atoens. (b) If the wire is heated to \( 38.0^{\circ} \mathrm{C} \) while the \( 7.00^{\circ} \cdot \mathrm{V} \) potential difference is maintained, what is the resulting current in the wire?