Principles of Electricity and Electromagnetism |
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Page 42
... density q , is E , = qi 2пког 8. A circular disk of radius R is charged to a uniform surface density qs . Show that the electric field on the axis of the disk a distance x from the center is given by Ex = ཤཱཿ * ། 2 [ 1 − x ( R2 + x2 ) ...
... density q , is E , = qi 2пког 8. A circular disk of radius R is charged to a uniform surface density qs . Show that the electric field on the axis of the disk a distance x from the center is given by Ex = ཤཱཿ * ། 2 [ 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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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