Principles of Electricity and Electromagnetism |
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Page 217
... hence alters but slightly the circuit under measurement . A discussion of a typical voltmeter circuit , such as that of Fig . 7.17 , illustrates many points of interest in vacuum - tube technique . In the first place , all the elements ...
... hence alters but slightly the circuit under measurement . A discussion of a typical voltmeter circuit , such as that of Fig . 7.17 , illustrates many points of interest in vacuum - tube technique . In the first place , all the elements ...
Page 218
... Hence the meter deflection which is proportional to the direct - current component of i , is also proportional to the average of the positive values of e . Thus this arrangement measures the average positive - grid potential . If the ...
... Hence the meter deflection which is proportional to the direct - current component of i , is also proportional to the average of the positive values of e . Thus this arrangement measures the average positive - grid potential . If the ...
Page 431
... Hence a measurement of io , Cr , i , and C determines the value of Q for the circuit at the resonant frequency . For large values of Q , C , is very critical and difficult to determine ; hence it is more satisfactory to find the two ...
... Hence a measurement of io , Cr , i , and C determines the value of Q for the circuit at the resonant frequency . For large values of Q , C , is very critical and difficult to determine ; hence it is more satisfactory to find the two ...
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alternating current alternating-current amplitude angle angular velocity anode applied approximately armature assumed atom axis calculated capacity cathode cell centimeter characteristic charge q circuit coefficient coil component condenser conduction conductor considered copper current density current flowing curve cylinder deflection determined dielectric constant direct-current discharge distance effective electric field electromotive force electrons electrostatic element energy equal equation ferromagnetic filament flux force frequency function galvanometer given grad grid hence hysteresis impedance induction insulating integral known Laplace's equation linear load magnetic field magnetic moment magnitude maximum measured medium metal meter molecules negative normal obtained ohms parallel plate polarization potential difference potential wave potentiometer produced proportional quantity R₁ radius ratio rectifier region represents resistance rotation Show shown in Fig solenoid solution substance surface temperature terminals theorem torque tube V₁ vector voltage volts wire written zero