Principles of Electricity and Electromagnetism |
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Page 203
... limited by the cathode temperature . At relatively low potentials where Eq . ( 7.4 ) applies the current is said to be space - charge - limited . At considerably higher potentials the saturation current which is deter- mined by the ...
... limited by the cathode temperature . At relatively low potentials where Eq . ( 7.4 ) applies the current is said to be space - charge - limited . At considerably higher potentials the saturation current which is deter- mined by the ...
Page 236
... limited by space charge will flow per square centimeter of area between a plane cathode and anode 1 cm . apart in a vacuum if a potential difference of 1,000 volts exists between them ? = 2. Assuming that the total space - charge - limited ...
... limited by space charge will flow per square centimeter of area between a plane cathode and anode 1 cm . apart in a vacuum if a potential difference of 1,000 volts exists between them ? = 2. Assuming that the total space - charge - limited ...
Page 268
... limited . Thus if the cathode emission is limited to a lime spot on a hot - metal surface and the pressure is moderately low , electrons are emitted normally and form a narrow pencil of luminous plasma down the tube . The positive - ion ...
... limited . Thus if the cathode emission is limited to a lime spot on a hot - metal surface and the pressure is moderately low , electrons are emitted normally and form a narrow pencil of luminous plasma down the tube . The positive - ion ...
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alternating current alternating-current amplitude angle angular velocity anode applied approximately armature assumed atom axis calculated capacity cathode cell centimeter characteristic charge q circuit coefficient coil component condenser conduction conductor considered copper current density current flowing curve cylinder deflection determined dielectric constant direct-current discharge distance effective electric field electromotive force electrons electrostatic element energy equal equation ferromagnetic filament flux force frequency function galvanometer given grad grid hence hysteresis impedance induction insulating integral known Laplace's equation linear load magnetic field magnetic moment magnitude maximum measured medium metal meter molecules negative normal obtained ohms parallel plate polarization potential difference potential wave potentiometer produced proportional quantity R₁ radius ratio rectifier region represents resistance rotation Show shown in Fig solenoid solution substance surface temperature terminals theorem torque tube V₁ vector voltage volts wire written zero