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

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Page 7

The next in simplicity is an arrangement of two equal and opposite charges

separated by a

to be small in comparison to the

we ...

The next in simplicity is an arrangement of two equal and opposite charges

separated by a

**distance**. We shall consider the separation between the chargesto be small in comparison to the

**distance**of the field point (i.e. the point at whichwe ...

Page 174

such that in thc time taken by the electromagnetic influence to travel the

i.e. I r - r' l/c, the source characteristics p and j do not appreciably change, we can

replace t' by / in the integrals of equations (18) and (19) and obtain A (r, 0 = U j ...

such that in thc time taken by the electromagnetic influence to travel the

**distance**i.e. I r - r' l/c, the source characteristics p and j do not appreciably change, we can

replace t' by / in the integrals of equations (18) and (19) and obtain A (r, 0 = U j ...

Page 240

Obviously if the plate CD is beyond the line EFGH, it will not receive any electron

while if CD be at a smaller

arrangement thus enables us to determine the

and from ...

Obviously if the plate CD is beyond the line EFGH, it will not receive any electron

while if CD be at a smaller

**distance**it B will receive them. A detectingarrangement thus enables us to determine the

**distance**between AB and EFGHand from ...

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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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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