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

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Page 10

3 (a) & 3 (b) As the point X approaches the disc, the

tends to 2na on either side but the direction of the intensity is opposite on two

sides of the disc. Hence there is a discontinuity in the intensity of

This ...

3 (a) & 3 (b) As the point X approaches the disc, the

**magnitude**of the intensitytends to 2na on either side but the direction of the intensity is opposite on two

sides of the disc. Hence there is a discontinuity in the intensity of

**magnitude**4jio\This ...

Page 53

(Note that the potential on the sphere is (Q - q')/a and thus depends on both the

position and

(i.e. R >a), the potential is Q-q 0(R,V) = ^-f-+-~ 1/2' (R2 +r2- 2rR cos 0) <ia ~r(/?2 ...

(Note that the potential on the sphere is (Q - q')/a and thus depends on both the

position and

**magnitude**of the charge at P.) At any point (/?,0) outside the sphere(i.e. R >a), the potential is Q-q 0(R,V) = ^-f-+-~ 1/2' (R2 +r2- 2rR cos 0) <ia ~r(/?2 ...

Page 55

Consider now the effect of following three charges, (i) a charge of

placed at A. (ii) a charge of magmitude + b placed at B. (ii i) a charge of

in case ...

Consider now the effect of following three charges, (i) a charge of

**magnitude**+ aplaced at A. (ii) a charge of magmitude + b placed at B. (ii i) a charge of

**magnitude**- ab/(a2 + b2) m at d. From our previous discussion of image chargesin case ...

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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