Principles of Electricity and Electromagnetism |
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Page 62
... grad U. F = grad ( p . E ) = ( p . grad ) E * ( 2.16 ) where p is removed from behind the symbol for the partial derivatives since it does not depend on the coordinates . If E does not depend on the coordinates either , i.e. , if E is ...
... grad U. F = grad ( p . E ) = ( p . grad ) E * ( 2.16 ) where p is removed from behind the symbol for the partial derivatives since it does not depend on the coordinates . If E does not depend on the coordinates either , i.e. , if E is ...
Page 175
... ( grad n ) / n = grad ( log . n ) , iv = en ( u1u2 ) 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 gradient ...
... ( grad n ) / n = grad ( log . n ) , iv = en ( u1u2 ) 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 gradient ...
Page 294
... grad div A - V2A , = = · Β / μ μo = V2A grad div A = -μον 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 - S με Α 47 ...
... grad div A - V2A , = = · Β / μ μo = V2A grad div A = -μον 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 - S με Α 47 ...
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alternating current alternating-current amplitude angle angular velocity anode applied approximately armature assumed atom axis calculated capacity cathode cell centimeter characteristic charge q circuit coefficient coil component condenser conduction conductor considered copper current density current flowing curve cylinder deflection determined dielectric constant direct-current discharge distance effective electric field electromotive force electrons electrostatic element energy equal equation ferromagnetic filament flux force frequency function galvanometer given grad grid hence hysteresis impedance induction insulating integral known Laplace's equation linear load magnetic field magnetic moment magnitude maximum measured medium metal meter molecules negative normal obtained ohms parallel plate polarization potential difference potential wave potentiometer produced proportional quantity R₁ radius ratio rectifier region represents resistance rotation Show shown in Fig solenoid solution substance surface temperature terminals theorem torque tube V₁ vector voltage volts wire written zero