## Principles of Electricity and Electromagnetism |

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Page 202

electrons start from rest at the

surface of this electrode). Assuming the electrodes to be normal to the z axis,

Poisson's equation (Sec. 1.7) reduces to d°W q, dro T Two (7.1) q, can be

expressed in ...

electrons start from rest at the

**cathode**(the potential minimum is then at thesurface of this electrode). Assuming the electrodes to be normal to the z axis,

Poisson's equation (Sec. 1.7) reduces to d°W q, dro T Two (7.1) q, can be

expressed in ...

Page 261

If the potential is applied to the tube in the reverse sense, no discharge ensues

until the potential is sufficiently high to induce electron emission from the plate

and establish a cold-

...

If the potential is applied to the tube in the reverse sense, no discharge ensues

until the potential is sufficiently high to induce electron emission from the plate

and establish a cold-

**cathode**discharge. This is known as the flashback potential...

Page 266

Cold-

have been discussed only in the mechanism of electron emission by the

Before the discharge can develop from the Townsend stage to that characterized

...

Cold-

**cathode**Discharges.—The cold-**cathode**discharge differs from those thathave been discussed only in the mechanism of electron emission by the

**cathode**.Before the discharge can develop from the Townsend stage to that characterized

...

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alternating current alternating-current amplitude angle angular velocity anode antenna applied approximately armature assumed atom axis calculated capacity cathode centimeter characteristic circuit coefficient coil component condenser conducting conductor considered curl current flowing curve deflection density determined dielectric constant direct-current direction discharge displacement distance effective electric field electromotive force electrons electrostatic element energy equal equation ferromagnetic flux force frequency function galvanometer given grad grid hence hysteresis impedance induction integral ions known Laplace's equation linear load magnetic field magnetic moment magnitude maximum measured meter motor negative normal obtained ohms oscillations output parallel phase plane plate polarization positive potential difference potentiometer produced proportional quantity radiation radius ratio reactance region represents resistance resonant rotation Show shown in Fig solenoid solution substance surface temperature terminals theorem torque transformer tube unit vector voltage volts wave wire written zero