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Electrodynamics – It deals with electric and magnetic phenomena associated with charged and magnetic bodies. Examples, o motion of a current-carrying conductor in a magnetic field o the response of a circuit to an ac voltage( signal) o the propagation of radio waves in the ionosphere
o Optics – It deals with phenomena involving light. Examples, o Reflection and refraction of light o Dispersion of light through a prism o Colour exhibited by thin films o
Thermodynamics – It deals with systems in macroscopic equilibrium and changes in internal energy, temperature, entropy etc. of systems under application of external force or heat. Examples, o Efficiency of heat engines o Direction of physical and chemical process