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RADIO TELEGRAPHY AND TELEPHONY
Elementary Theory of Electricity
26 other sections not shown
Alaska alternating current ammeter amperes amplifier amplitude angle antenna circuit applied emf armature atom battery calibration cell charge coil condenser conductor connected constant coupling current flowing curve cycles decrease decrement deflection detector dielectric direct current direction discharge Divides effective height electric field electrons energy equal filament flux formula frequency FX FX FX galvanometer given harmonic heat Hence heterodyne impressed emf increase induced emf instant insulator intensity lines loop antenna magnetic field maximum measured metal meters method motor mutual inductance negative number of turns obtained Ohm's law ohms operation oscillations oscillatory circuit phase plate circuit plate current pole positive potential produced radiation radio radio-compass radio-frequency reactance receiving resistance resonance result rotated secondary shown in figure shunt signal station substituting telephones temperature thermocouple transformer transmitter tuned U. S. Navy vacuum tube variation varying voltage volts wave length wavemeter whence winding wire zero