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Electrostatic Fields in Material Bodies Energy and Forces
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angle antenna applied field arbitrary array assumed axis body boundary conditions capacitance capacitor charge density charge Q circuit component conducting conductor Consequently consider constant coordinates curl current density current flow current loop cylinder derived dielectric differential direction displacement divergence divergence theorem electric field electromagnetic electron electrostatic field element energy stored equal equivalent evaluate example expression ferromagnetic field point finite flux linking force frequency function given Helmholtz's theorem hence illustrated in Fig infinite integral Laplace's equation line charge line integral linear magnetic dipole magnetic field magnitude material Maxwell's equations meter mode normal Note obtain permittivity plane wave plates Poisson's equation polarization Poynting vector Prob problem propagation radiated radius rectangular region result scalar potential sin2 solution space sphere spherical surface charge tangential theorem time-varying tion toroid uniform unit volume vector field vector potential velocity waveguide zero