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Temperature Dependence of Resistance
This lecture explores the temperature dependence of resistance in materials, explaining how the random movement of charges affects resistance, leading to a linear relationship between resistance and temperature. The instructor demonstrates the derivation of a simple formula to calculate resistance at different temperatures, highlighting the coefficient of temperature and its significance in material properties. The lecture also discusses the unique behavior of certain materials, such as semiconductors, whose resistance decreases with increasing temperature, providing practical exercises for further understanding.