quiz10spr01 - ~"1 ~ 3313 Answer Spring anv Quiz 10 2001 4...

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~ "1.. ~ " 3313, Spring 2001 Quiz 10 Answer anv 4 Questions onlv, 1 point each With reference to this diagram that I showed on the overhead projector, a) what metal(s) is it appropriate for? b) identify the Fermi energy level. c) how do I know the diagram represents the situation at OOK? d) why is the metal likely to be a poor electrical conductor? a) overlapping s and p bands, so a Group n metal, such as beryllium b) At the transition from occupied to unoccupied levels c) the transition ofEf is abrupt ENERGY E--. d) s band nearly full, p band nearly empty, n and ~ are low 2. I showed a diagram akin to this on the overhead projector. Reason what the Pt, Pi, and Pd signify. Tomperatu..("FJ FIGURE 19.8 The 6 -400 -300 -200 -loo 0 .100 electrical resistivity versus I I I I I I temperature for copper and three copper-nlckel alloys, one of which has been deformed. Thermal, impurity, and deformation I contributions to tbe resistivity are indicated at I -l00"C. [Adapted from J.
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