5. Given below is a log-log plot of thermal conductivity (K7) vs temperature (T) of a non-metallic electric insulator. Explain the respective variations in KT with Tin the three different regimes indicated in the figure. (b) - exp(8,/27) Slope = +3 Slope =-1 II log T log K7

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.