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amplitude attenuation axis becomes boundary condition centim centre circular complete solution conducting dielectric conductor conjugate property constant copper corresponding cylinder differential equation diffusion displacement distance distribution E0 and H0 effect electric and magnetic electric conductivity electric current electric field Electromagnetic Induction Electromagnetic Waves electrostatic expresses external field filament finite flux forced vibrations formula frequency front functions given impressed electric force impressed force infinitely conducting infinitely long infinity initial integrations J. J. Thomson line-integral longitudinal magnetic field magnetic force magnetic induction Maxwell's medium negative nonconducting dielectric obtain Oliver Heaviside operator outward wave parallel permittance Phil plane waves primary wave problem produce propagation radial component radius reflected wave reflexion resistance result right side scalar self-induction sheet sinusoidal speed sphere subsidence surface-density tangential tangential component telephony theory tion travelling shell tube unit length vanish vector vortex line vorticity whilst wire zero
Page 391 - The whole work done by impressed forces suddenly started exceeds the amount representing the waste by Joule-heating at the final rate (when there is any), supposed to start at once, by twice the excess of the electric over the magnetic energy of the steady field set up.