## Principles of Electricity and Electromagnetism |

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Page 98

K0 The quantity gF is the current density and the terms in brackets are together

equal to

in an inhomogeneous conducting medium implies ^* the existence of a charge ...

K0 The quantity gF is the current density and the terms in brackets are together

equal to

**grad**(k/g), as may be seen by expansion. Therefore a current density i,in an inhomogeneous conducting medium implies ^* the existence of a charge ...

Page 99

K0 The quantity a E is the current density and the terms in brackets are together

equal to

in an inhomogeneous conducting medium implies o 7 the existence of a charge ...

K0 The quantity a E is the current density and the terms in brackets are together

equal to

**grad**(k/a), as may be seen by expansion. Therefore a current density i,in an inhomogeneous conducting medium implies o 7 the existence of a charge ...

Page 294

Since H = B/uo = (1/ub) curl A and (Appendix D) curl curl A =

*A –

case of a spatial distribution of currents i dl would be written i, do and Eq. (9.13) ...

Since H = B/uo = (1/ub) curl A and (Appendix D) curl curl A =

**grad**div A – VoA, W*A –

**grad**div A = —udi, It may be shown that the divergence of A vanishes. In thecase of a spatial distribution of currents i dl would be written i, do and Eq. (9.13) ...

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alternating current alternating-current amplitude angle angular velocity anode antenna applied approximately armature assumed atom axis calculated capacity cathode centimeter characteristic circuit coefficient coil component condenser conducting conductor considered curl current flowing curve deflection density determined dielectric constant direct-current direction discharge displacement distance effective electric field electromotive force electrons electrostatic element energy equal equation ferromagnetic flux force frequency function galvanometer given grad grid hence hysteresis impedance induction integral ions known Laplace's equation linear load magnetic field magnetic moment magnitude maximum measured meter motor negative normal obtained ohms oscillations output parallel phase plane plate polarization positive potential difference potentiometer produced proportional quantity radiation radius ratio reactance region represents resistance resonant rotation Show shown in Fig solenoid solution substance surface temperature terminals theorem torque transformer tube unit vector voltage volts wave wire written zero