Principles of Electricity and Electromagnetism |
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Page 189
... electrons from a heated surface . The forces tending to retain the cloud of conduction electrons within a metal are very large , but the bounding surface is not mathematically sharp , and even at ordinary temperatures a thin atmosphere ...
... electrons from a heated surface . The forces tending to retain the cloud of conduction electrons within a metal are very large , but the bounding surface is not mathematically sharp , and even at ordinary temperatures a thin atmosphere ...
Page 241
... electrons of the same energy . 5. Electron Emission Due to Metastable Atoms . - The phenomena described under the next heading result in the dislocation or disruption of the normal electron structures surrounding the atoms or molecules ...
... electrons of the same energy . 5. Electron Emission Due to Metastable Atoms . - The phenomena described under the next heading result in the dislocation or disruption of the normal electron structures surrounding the atoms or molecules ...
Page 249
... electrons move more rapidly in a field than do positive ions . As the current density is the product of the charge density and the velocity , all but about 1 per cent of the current is carried by electrons ( neglecting the possibility ...
... electrons move more rapidly in a field than do positive ions . As the current density is the product of the charge density and the velocity , all but about 1 per cent of the current is carried by electrons ( neglecting the possibility ...
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alternating current alternating-current ampere amplifier amplitude angle angular anode antenna applied approximately armature assumed atom 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 dynamic resistance effective electric field electromagnetic electromotive force electrons electrostatic element energy equal equation flux force frequency function galvanometer grad harmonic hence impedance induction integral ions known length linear load magnetic field magnetic moment magnitude maximum measured meter negative obtained ohms oscillations output parallel phase plane plate current positive potential difference potentiometer quantities R₁ radiation radius ratio reactance region represents resistance resonant rotation scalar shown in Fig solution surface temperature terminals theorem torque transconductance triode tube unit vacuum tube vector velocity voltage volts wave wire written zero