Principles of Electricity and Electromagnetism |
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Page 62
... grad U. Therefore - 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. ...
... grad U. Therefore - 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. ...
Page 175
... ( grad n ) / n = grad ( log , n ) , iv = en ( u1 + u2 ) E 12 ) [ 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 ) , iv = en ( u1 + u2 ) E 12 ) [ 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 = - Moir 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 4π S dv the ...
... grad div A - V2A , - V2A - grad div A = - Moir 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 4π S dv the ...
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alternating current alternating-current ampere amplifier amplitude angle angular anode antenna applied approximately armature assumed atom axis calculated capacity cathode cell characteristic charge circuit coefficient coil component condenser conducting conductor considered constant curl current flowing curve deflection density determined dielectric dielectric constant direct-current direction dynamic resistance effective electric field electromagnetic electromotive force electrons electrostatic element energy equal equation flux force frequency function galvanometer grad harmonic hence impedance induction integral ions known length linear load magnetic field magnetic moment magnitude maximum measured meter negative obtained ohms oscillations output parallel phase plane plate current positive potential difference potentiometer quantities R₁ radiation radius ratio reactance region represents resistance resonant rotation scalar shown in Fig solution surface temperature terminals theorem torque transconductance triode tube unit vacuum tube vector velocity voltage volts wave wire written zero