## Principles of Electricity and Electromagnetism |

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Page 203

Actually , of course , this is not the case for the supply of electrons is

cathode temperature . At relatively low potentials where Eq . ( 7 . 4 ) applies the

current is said to be space - charge -

Actually , of course , this is not the case for the supply of electrons is

**limited**by thecathode temperature . At relatively low potentials where Eq . ( 7 . 4 ) applies the

current is said to be space - charge -

**limited**. At considerably higher potentials ...Page 236

What electron current

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

...

What electron current

**limited**by space charge will flow per square centimeter ofarea 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

...

Page 268

The volume of the plasma may be very strictly

emission is

moderately low , electrons are emitted normally and form a narrow pencil of

luminous ...

The volume of the plasma may be very strictly

**limited**. Thus if the cathodeemission is

**limited**to a lime spot on a hot - metal surface and the pressure ismoderately low , electrons are emitted normally and form a narrow pencil of

luminous ...

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angle applied approximately assumed atom axis becomes calculated capacity carrying cell characteristic charge circuit closed coil component condition conducting conductor connected considered constant curve density depends determined dielectric difference direction discharge discussion distance effective electric electrons element energy equal equation evident expression factor field flow flux force frequency function galvanometer given grid hence impedance important increases indicated induction integral ions known length limited linear load losses magnetic magnetic field magnitude maximum means measured mechanical metal meter method negative normal obtained oscillations parallel path period phase placed plate positive potential present produced proportional quantities radius ratio reduced region relation represents resistance respect result rotation seen separation Show shown simple solution space surface temperature terminals transformer tube unit vector volts volume wave wire written zero