## The fundamentals of electro-magnetism |

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### Contents

The effect of the dielectric constant K on capacitance | 33 |

The mechanical force acting on the charged surface of | 34 |

The capacitance of certain capacitors | 36 |

Copyright | |

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air-gap ampere ampere-turns armature atoms axis c.g.s. units calculated capacitance capacitor carrying current changing charge q circuital law coefficient coil component concept conduction current conductor Consider coulomb current flows current-circuit cylinder definition density dielectric constant direction displacement current distance e.m.f. induced electric and magnetic electric charges electric current electric field electro-magnetic electro-static field electrons energy stored equal equation experience field intensity flux linking flux-cutting flux-density free space fundamental gauss given Hence induced e.m.f. insulator inverse-square law length Lenz's Law lines of force loop m.k.s. system m.m.f. gradient magnetic field magnetic flux magnetization curve magnitude Maxwell measured metre motion moving charge moving with velocity mutual force mutual inductance negative charges observer perpendicular physical plane plates pole positive charge potential difference radius relative resistance result rotating solenoid sphere stationary steady current surface theory torque tube vector potential volts weber wire zero