## PRINCIPLES OF ELECTRICITY AND ELECTROMAGNETISM |

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alternating current alternating-current ampere amplifier amplitude angle angular anode antenna applied approximately armature assumed atoms axis calculated capacity cathode cell characteristic charge circuit coefficient coil component condenser conducting conductor considered constant curl current flowing curve deflection density determined dielectric dielectric constant direct-current direction discharge effective electric field electromagnetic electromotive force electrons electrostatic element energy equal equation factor flux force frequency function galvanometer given grad grid hence impedance induction integral ions known Laplace's equation linear load magnetic field magnetic induction magnetic moment magnitude maximum measured metal meter molecules negative normal obtained ohms oscillation output parallel phase plane plate polarization positive potential difference potentiometer produced proportional quantity radiation radius ratio reactance region represents resistance resonant rotation Show shown in Fig solution surface temperature terminals theorem torque tube vector velocity voltage volts wire written zero