(main)[5]
Using band theory, explain why the resistance of a metal sample at room temperature changes as the temperature increases.
Physics 9702 · AS & A Level · Wave-particle duality
Wave-particle duality — practice question
Figure 11.1 illustrates some of the electron energy bands in a solid. The size of the forbidden band and the number of charge carriers in each band depend on the type of solid.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The conduction band overlaps the valence band, so there is no band gap” …
- Full mark scheme, point by point
- Step-by-step worked solution
- Write your answer & get it marked instantly by AI