Principles of Electricity and Electromagnetism |
From inside the book
Results 1-3 of 84
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 ...
Other editions - View all
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 grad grid hence impedance induction integral ions known Laplace's equation length linear load magnetic field magnetic moment magnitude maximum measured metal meter negative obtained ohms oscillations output parallel phase plate positive potential difference potential wave potentiometer produced proportional quantities R₁ radiation radius ratio reactance region represents resistance resonant rotation shown in Fig solenoid solution surface temperature terminals theorem torque tube unit V₁ vector velocity voltage volts wire written zero