32 pages matching magnetic field in this book
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VACUUM TUBES GAS TUBES
13 other sections not shown
alternating current amplitude anode antenna audio basic bias voltage capacitance capacitor charge class-B coil collector connected constant core coupling crystal crystal oscillator current flow curve cutoff cycle d-c voltage decreases detector devices diode direct current discharge electrical electron flow emitter energy feedback filter function germanium grid circuit grid voltage half-cycle half-wave harmonic Hartley oscillator heat ignitrons impedance increases inductance inductor input voltage ionization kilohms load resistor magnetic amplifier magnetic field modulation multivibrator negative ohms operation oscillator output voltage parallel peak pentode phase plate circuit plate current plate voltage polarity positive potential produce pulse radio ratio reactance rectifier relay resistor ripple screen grid secondary Section selenium semiconductors sensor shown in Figure signal sine wave supply switch tank circuit temperature tetrode thyratron transformer transistor triode vacuum tubes varies voltage applied voltage divider voltage drop wave form wave shape wire zero