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23 Nov 2019
(a) Sketch a typical stress-strain diagram showing the effect thatwork hardening has on a material. Include the yield points, theregions of elastic and plastic deformation and briefly explain whatis involved in work hardening.
(b) what is the law of equipartition of energy and how did itrelate to the 'ultraviolet catastrophe'?
(c) How does the band theory of solids lead to the classificationof solids into conductors, semiconductors and insulators? Givetypical values of band gaps for semiconductors and insulators.Explain why scientists use semiconducting materials for solar cells
(a) Sketch a typical stress-strain diagram showing the effect thatwork hardening has on a material. Include the yield points, theregions of elastic and plastic deformation and briefly explain whatis involved in work hardening.
(b) what is the law of equipartition of energy and how did itrelate to the 'ultraviolet catastrophe'?
(c) How does the band theory of solids lead to the classificationof solids into conductors, semiconductors and insulators? Givetypical values of band gaps for semiconductors and insulators.Explain why scientists use semiconducting materials for solar cells
