## Principles of Electricity and Electromagnetism |

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Page 211

If any

same as e0, the potential wave applied to the

...

If any

**grid**current is drawn and re is not negligible, the variation e„ will not be thesame as e0, the potential wave applied to the

**grid**circuit. The maximum positive-**grid**excursion will be smaller than the maximum positive value of e0 by the drop...

Page 262

Gas or vapor discharges can be used for power-control purposes if one or more

different from that in a high-vacuum tube, for once the discharge starts, the ...

Gas or vapor discharges can be used for power-control purposes if one or more

**grids**are inserted between the cathode and anode. The action of the**grid**is quitedifferent from that in a high-vacuum tube, for once the discharge starts, the ...

Page 263

positive

electrons reach it from the cathode, even before the discharge starts. And after

breakdown there must be a protective series resistance to lower its potential and

limit the ...

positive

**grid**. The positive-**grid**tube, of course, draws more**grid**power aselectrons reach it from the cathode, even before the discharge starts. And after

breakdown there must be a protective series resistance to lower its potential and

limit the ...

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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 discharge effective electric field electromagnetic electromotive force electrons electrostatic element energy equal equation flux force frequency function galvanometer given grid hence impedance induction integral ions known Laplace's equation length linear load magnetic field magnetic induction magnitude maximum measured metal meter negative normal obtained ohms oscillations output parallel phase plane plate polarization positive potential difference potential wave potentiometer produced proportional quantities radiation radius ratio reactance region represents resistance resonant rotation scalar Show shown in Fig solenoid solution surface temperature terminals theorem torque tube unit vector velocity voltage volts wire written zero