## Principles of Electricity and Electromagnetism |

### From inside the book

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Page 134

box, of course, draws a current from the external circuit and hence is not adapted

to the

of V'/i', where V is the maximum potential that can be

box, of course, draws a current from the external circuit and hence is not adapted

to the

**measurement**of emfs. ... The standard resistance S should be of the orderof V'/i', where V is the maximum potential that can be

**measured**by the ...Page 191

This quantity n would be difficult to

from the surface is equal to n times e, the electronic charge times the ... The value

of the temperature may be

This quantity n would be difficult to

**measure**, but the current which can be drawnfrom the surface is equal to n times e, the electronic charge times the ... The value

of the temperature may be

**measured**with a thermocouple or optical pyrometer.Page 345

can be

magnetic field that induces the same moment as the rotation <,>, — = — =• From

a knowledge of H and <o the ratio of the magnetic to mechanical moment of the ...

can be

**measured**and likewise the moment induced by the rotation u. If H is themagnetic field that induces the same moment as the rotation <,>, — = — =• From

a knowledge of H and <o the ratio of the magnetic to mechanical moment of the ...

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### Common terms and phrases

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 grid hence 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 scalar Show shown in Fig solenoid solution surface temperature terminals theorem torque tube unit vector velocity voltage volts wire written zero