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Q3 (16 marks) 4) State the name of "work-energy theorem" of electrodynamics and explain its respective physical meaning? B) Is Newton's third law valid in electrodynamics? If YES, how do you justify its validity in electrodynamics? C) Write down integral and differential forms of the formulas that describe the conservation law of total charge in a volume 1 bounded by the surface S. State briefly the physical meaning of this fundamental conservation law? D) An air-filled parallel-plate capacitor with surface charge densities to, plate area A, plate separation d, and a uniform electric field E = E 2 between its plates is placed in a uniform magnetic field B = B R. Write E in terms of a and co. Then find the total electromagnetic momentum in the empty space between the plates