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Answer:
Thermionic emission is the liberation of electrons from an electrode by virtue of its temperature This occurs because the thermal energy given to the charge carrier overcomes the work function of the material. The charge carriers can be electrons or ions, and in older literature are sometimes referred to as thermions. After emission, a charge that is equal in magnitude and ..
Explanation:
Answer:
Thermal conductivity of polymer-particle composites increases progressively with temperature reaches a maximum and then starts to fall. With increasing temperature the molecular and structural vibrations increase giving higher phonon propagation and higher thermal conductivity reaching a maximum value at certain temperature. However with the increasing temperature and consequent vibrations a balance between phonon propagation and its scattering reached and beyond this temp. k reduces with temperature. Dr. B R Gupta