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Use band theory to explain why the resistance of a metal sample at room temperature varies when the temperature is increased.
Physics 9702 · AS & A Level · Energy levels in atoms and line spectra
Energy levels in atoms and line spectra — practice question
Figure 11.1 shows several of the electron energy bands present in a solid. The width of the forbidden band and the number of charge carriers in each band depend on the nature of the solid.
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