By Julius Adams Stratton
This booklet is an electromagnetics vintage. initially released in 1941, it's been utilized by many generations of scholars, academics, and researchers ever in view that. because it is vintage electromagnetics, each bankruptcy remains to be referenced to this day.This vintage reissue comprises the whole, unique variation first released in 1941. also, new forewords by means of Dr. Paul E. grey (former MIT President and colleague of Dr. Stratton) and one other via Dr. Donald G. Dudley, Editor of the IEEE Press sequence on E/M Waves at the value of the book's contribution to the sphere of Electromagnetics.
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Additional info for Electromagnetic Theory (IEEE Press Series on Electromagnetic Wave Theory)
Since the flow is solenoidal, the current I through every cross section of the filament is the same. Let S be the cross-sectional area of the filament on a plane drawn normal to the direction of flow. X need not be infinitesimal, but is assumed t o be so small that over its area the current density is uniform. I b l ads, 1 It is true t h a t to a very slight degree the current distribution in a liquid or solid conductor may be modified by an impressed magnetic field, but the magnitude of this so-called Hall effect is so small that it may be ignorcd without incurring an appreciable error.
If there are n such turns carrying a current I , the total current threading C is nI ampere-turns and it is customary to express magnetomotive force in these terms, although dimensionally n is a numeric. ] = ampere-turns, whence = -. ampere-turns - Q meter LT It will be observed that the dimensions of D and those of H divided by a velocity are identical. For the parameter po we find - ML volt second - -. As in the case of c,, it is convenient to express po in terms of a derived unit, in this case the henry, defined as 1 volt-second/amp.
81 basic quantities, mass, length, time, and charge. That this system is identical with the practical series may be verified by the substitutions (17) 1 kilogram = lo3 grams, lo2 centimeters, 1 coulomb = & abcoulomb. 1 meter = The numerical factors which now appear in each relation are observed t o be those that relate the practical units to the absolute electromagnetic units. For example, from (6), (18) 1 ohm = 1 kilogram. meter2 coulomb2 . second lo3 grams . lo4 centimeters2 abcoulomb2 ‘ seconds = lo9 abohms; and again from (8), (19) 1 volt = 1 kilogram.
Electromagnetic Theory (IEEE Press Series on Electromagnetic Wave Theory) by Julius Adams Stratton