Principles of Electricity and Electromagnetism |
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Page 175
... ( grad n ) / n = grad ( log . n ) , i , = = en ( u1 + u2 ) E - - ( D1 — D2 ) ( u1 + u2 ) grad ( log , n ) ] The second term in the bracket is the nonelectrical force per unit charge which is brought into existence by the concentration ...
... ( grad n ) / n = grad ( log . n ) , i , = = en ( u1 + u2 ) E - - ( D1 — D2 ) ( u1 + u2 ) grad ( log , n ) ] The second term in the bracket is the nonelectrical force per unit charge which is brought into existence by the concentration ...
Page 294
... grad div A - V2A , V2A - grad div A = -μαι It may be shown that the divergence of A vanishes . In the case of a spatial distri- bution of currents i dl would be written i , dv and Eq . ( 9.13 ) would become A = μο dv 4π T the ...
... grad div A - V2A , V2A - grad div A = -μαι It may be shown that the divergence of A vanishes . In the case of a spatial distri- bution of currents i dl would be written i , dv and Eq . ( 9.13 ) would become A = μο dv 4π T the ...
Page 599
... grad , u = Ər 1 ди grad , u = r dø ди grad , u = Əz Components of the Curl 1 0А , curl , A = curl , A = curl , A = r 34 ӘА , JA . Əz - ǝr ӘАф dz ar div A = 1 მ r ər ( rA , ) + V2u = 1 a T - JA , a❤ 1 Аф JA , r 24 Laplacian You ( 1 ) + ...
... grad , u = Ər 1 ди grad , u = r dø ди grad , u = Əz Components of the Curl 1 0А , curl , A = curl , A = curl , A = r 34 ӘА , JA . Əz - ǝr ӘАф dz ar div A = 1 მ r ər ( rA , ) + V2u = 1 a T - JA , a❤ 1 Аф JA , r 24 Laplacian You ( 1 ) + ...
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angle antenna 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 result rotation seen separation Show shown simple solution space surface temperature terminals transformer tube unit vector volts volume wave wire written zero