Principles of Electricity and Electromagnetism |
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Page 42
... density q is E , = 2πkor 8. A circular disk of radius R is charged to a uniform surface density q .. Show that the electric field on the axis of the disk a distance x from the center is given by 4 • ་ 1 Ex = 2ko [ 1 − x ( R2 + x2 ) ...
... density q is E , = 2πkor 8. A circular disk of radius R is charged to a uniform surface density q .. Show that the electric field on the axis of the disk a distance x from the center is given by 4 • ་ 1 Ex = 2ko [ 1 − x ( R2 + x2 ) ...
Page 99
... density vanishes , but this condition is seldom fulfilled in practice . For good conductors the electric field is small for ordinary currents and this volume density of charge is generally negligible . In the case of an imperfect ...
... density vanishes , but this condition is seldom fulfilled in practice . For good conductors the electric field is small for ordinary currents and this volume density of charge is generally negligible . In the case of an imperfect ...
Page 267
... density is high , causing intense illumination , but at either end where the tube widens out the current density decreases , enough electrons diffuse into these regions to carry the discharge current so few new ones are formed , and ...
... density is high , causing intense illumination , but at either end where the tube widens out the current density decreases , enough electrons diffuse into these regions to carry the discharge current so few new ones are formed , and ...
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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