## The Fundamentals of Electro-magnetism |

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### Contents

The effect of the dielectric constant K on capacitance | 34 |

The mechanical force acting on the charged surface of | 35 |

The capacitance of certain condensers | 36 |

46 other sections not shown

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### Common terms and phrases

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