## Classical theory of electricity and magnetism: a course of lectures |

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Page 46

Thus, the measurement of dielectric constant

molecular characteristics. In equation (24) the molecular number density is often

replaced by N p/Af , where N is the Avogadro number, p the density and M the ...

Thus, the measurement of dielectric constant

**gives**very useful information aboutmolecular characteristics. In equation (24) the molecular number density is often

replaced by N p/Af , where N is the Avogadro number, p the density and M the ...

Page 109

... and Q be the charge on the capacitor at the instant, the potential difference

between the capacitor plates is QIC and from Faraday's law, the inductor

rise to an electromotive force - Ldlldt, so that if the impressed electromotive force

be E, ...

... and Q be the charge on the capacitor at the instant, the potential difference

between the capacitor plates is QIC and from Faraday's law, the inductor

**gives**rise to an electromotive force - Ldlldt, so that if the impressed electromotive force

be E, ...

Page 120

Thus the vector 4jr(E x H) apparently

unit area per unit time, the element of area being held normal to the direction of E

x H. This vector is known as the Poynting vector. There are, however, a few ...

Thus the vector 4jr(E x H) apparently

**gives**the amount of energy flowing throughunit area per unit time, the element of area being held normal to the direction of E

x H. This vector is known as the Poynting vector. There are, however, a few ...

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### Contents

The empirical basis of electrostatics | 1 |

Direct calculation of fields | 7 |

dipoles9 The Dirac 5function13 | 13 |

Copyright | |

23 other sections not shown

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### Common terms and phrases

acceleration angle angular axis boundary conditions calculate called centre charge density charge distribution charged particle coefficient coil components conducting conductor consider coordinates dielectric constant differential dipole direction distance divergence electric and magnetic electric field electromagnetic field electromotive force electron electrostatic energy flux equation 16 expression field due field point finite fluid formula Fourier frame frequency function given gives Hence incident infinite interaction isotropic Laplace's equation linear Lorentz transformation magnetic field magnitude Maxwell's equations medium molecule momentum motion number density obtain orthogonal oscillations permanent magnets perpendicular photon plane plasma point charge polarization potential due Poynting vector radiation field radiation reaction radius refractive index region relation result satisfied scalar shows sin2 solution special theory sphere at infinity spherical surface integral symmetry tensor term theorem theory of relativity transverse uniform vanishes vector potential velocity volume wave length write zero