00000029.htm

16 ELECTRIC DISdttARtm, WAVKH AMD IMPVMKtf.

This gives the average voltages gradient, while the actual gradient
in an ununiform field, an that between two conduct or*, varies,

being higher at the deiwer, and lower at the km define, portion of
the field, and is

a^^i* ;(i9)

«*

^K^4w
then is the dielectric-field intewwty, and

/; ^ «A" (20)

would be the dukctrie demili/, where n m a eonfttant itf tin¹ nm(i*rial_tthe electrostatic or dioltwtri« mm<lu«tivity» and in eiillint tlti» w/r-
aj^c capacity or permittivity*
For empty space, and thus with clow approximation for uir and

other gases,

, where

v - 8 X 10^lft

is the velocity of light*

It is customary, however, and convenient, to UH*« If it* |M*rmtl-
tivity of empty Bpace w unity: it ^ I* Thin etiiinigeN the unit of

dielectric-field intensity by the ft^tor ^5, mitt dM^trw4Md

intensity,

dielectric density,

D - i A; (±J)

where K « 1 for empty apaoo, aa<I between 2 and <$ fur tittwt Hciluin
and liquids, rarely inoroaaing beyond (I, exaept In iitntiTiiiN of

appreciable electric conductivity*

The dielectric flux then m

^ * AD. 1211!

analogous, and the corresponding values are tabulati**! in flit^
following Table I.

* The factor 4 T appears hero In ttu» chmomlnntcMr aH Ihn <rf ilm fnr,i*ir



	16 ELECTRIC DISdttARtm, WAVKH AMD IMPVMKtf. This gives the average voltages gradient, while the actual gradient in an ununiform field, an that between two conduct or, varies, being higher at the deiwer, and lower at the km define, portion of the field, and is a^^i ;(i9) «* ^K^4w then is the dielectric-field intewwty, and /; ^ «A" (20) would be the dukctrie demili/, where n m a eonfttant itf tin¹ nm(irial_tthe electrostatic or dioltwtri« mm<lu«tivity» and in eiillint tlti» w/r- aj^c capacity* or permittivity* For empty space, and thus with clow approximation for uir and other gases,

	, where v - 8 X 10^lft is the velocity of light* It is customary, however, and convenient, to UH« If it \|Mrmtl- tivity of empty Bpace w unity: it ^ I Thin etiiinigeN the unit of dielectric-field intensity by the ft^tor ^5, mitt dM^trw4Md intensity,

	dielectric density, D - i A; (±J) where K « 1 for empty apaoo, aa<I between 2 and <$ fur tittwt Hciluin and liquids, rarely inoroaaing beyond (I, exaept In iitntiTiiiN of appreciable electric conductivity* The dielectric flux then m ^ * AD. 1211! 12. As seen, th© dielectric and th* uri* t«ntirtly analogous, and the corresponding values are tabulati! in flit^ following Table I. The factor 4 T appears hero In ttu» chmomlnntcMr aH Ihn <rf ilm fnr,i*ir 47r in th© magnetio-fieid iatawlty jc, due to the