quiz10fall00 - ~ 1-7 ENSC 3313, Fall 2000 Answer any Quiz 4...

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£1-7 Name ENSC 3313, Fall 2000 Quiz 10 Answer any 4 questions only, 1 point each Sketched is an empty energy band for "s" electrons. Within it, sketch an appropriate occupancy distribution, ~ the Fermi energy level, for the group 1 metal potassium at- 25°C. Add explanatory comments! The band is half full; as T > O°K, the transition from empty to full levels is not abrupt. The Fenni energy level, Ef is the 50% occupancy level -the reference level. Density of Energy States N (E) ~ ~f Energy, E ~ 2. I show a diagram akin to this on the overhead projector. Reason what the Pt, Pi' and Pd signify. Temperature ("F) FIGURE 19.8 The -400 -300 -200 -100 O +loo electrical resistivity versus th I ~I-I I I I temperature for copper Pt would represent e !ota and three copper:-nickel resistivity of pure copper. alloys, one of which has been deformed. Thermal, impurity, and deformation th ... b .. th contributions to the Pi represents e !mpunty contri ution ill e resistivityare indicated at alloy.
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quiz10fall00 - ~ 1-7 ENSC 3313, Fall 2000 Answer any Quiz 4...

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