## Principles of Electricity and Electromagnetism |

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Page 380

However , to a very rough approximation the surface field is similar to one that

would be produced by a magnetic dipole near the center of the earth or by a

uniformly magnetized sphere coinciding

However , to a very rough approximation the surface field is similar to one that

would be produced by a magnetic dipole near the center of the earth or by a

uniformly magnetized sphere coinciding

**approximately**with the earth ' s surface .Page 487

attenuation a and the second the phase constant B . From the latter the velocity of

propagation is seen to be the same as for the resistanceless line to this

approximation .

**approximately**VI ' C ' / R ' y = VL ' di 2 M + jwvL ' C ' The first factor is theattenuation a and the second the phase constant B . From the latter the velocity of

propagation is seen to be the same as for the resistanceless line to this

approximation .

Page 495

... and the combination prevents the direct - current component of the plate

current from flowing through the transformer primary and reducing the effective

permeability of the core . The effective resistance presented to the tube is

... and the combination prevents the direct - current component of the plate

current from flowing through the transformer primary and reducing the effective

permeability of the core . The effective resistance presented to the tube is

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### Common terms and phrases

angle 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 respect result rotation seen separation Show shown simple solution space surface temperature terminals transformer tube unit vector volts volume wave wire written zero