## Principles of Electricity and Electromagnetism |

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Page 17

The integral over the

outside the

even ...

The integral over the

**surface**is then the total solid angle subtended by the**surface**at the point occupied by q. It can be seen from Fig. 1.11 that if q liesoutside the

**surface**, each infinitesimal conical solid angle du cuts the**surface**aneven ...

Page 18

Consider a hypothetical closed Gaussian

conductor, as at the left in Fig. 1.12. Since the electric field at every point on this

...

Consider a hypothetical closed Gaussian

**surface**lying completely inside aconductor, as at the left in Fig. 1.12. Since the electric field at every point on this

**surface**is zero, it can enclose no net charge. As this hypothetical**surface**can be...

Page 240

In the absence of the field an electron starting at a distance a from the

must possess an energy e<p to leave the cathode; in the presence of the field the

electron need only possess an energy ey' in order to surmount the potential ...

In the absence of the field an electron starting at a distance a from the

**surface**must possess an energy e<p to leave the cathode; in the presence of the field the

electron need only possess an energy ey' in order to surmount the potential ...

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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 discharge effective electric field electromagnetic electromotive force electrons electrostatic element energy equal equation flux force frequency function galvanometer given grad grid hence hysteresis impedance induction integral ions known Laplace's equation length linear load magnetic field magnetic induction magnitude maximum measured metal meter negative normal obtained ohms oscillations output parallel phase plane plate polarization positive potential difference potential wave potentiometer produced proportional quantities radiation radius ratio reactance region represents resistance resonant rotation Show shown in Fig solenoid solution surface temperature terminals theorem torque tube unit vector velocity voltage volts wire written zero