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Electrons and Ions
Electric and Magnetic Fields
Ion Motion in a Vacuum
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amplifier anode applied atoms base bias capacitor carriers cathode cell charge circuit of Fig coefficients collector component conduction band constant crystal current flow curves density diagram diffusion diode direction distribution effect elec electric field electron devices emission emitted emitter energy levels equation equivalent circuit feedback Fermi level flux frequency germanium give given gradient of potential grid current grid voltage holes impedance increases junction transistor layer linear load resistance magnetic field maximum metal mutual conductance n-type n-type semiconductor negative noise number of electrons ohms operation oscillator oxide p-n junction p-type pentode phototube plate current plate resistance plate voltage point-contact transistor positive quantum numbers ratio rectifier region relation relative resistor resonant result screen grid semiconductor shown in Fig shows signal silicon space current space-charge surface temperature tetrode tion triode trons vacuum triode vacuum tubes valence valence band variation velocity voltage volts wave wavelength zero