Principles of Electricity and Electromagnetism |
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Page 53
... hence is in the same direction whether V is positive or negative . Thus the instrument may be used to measure alternating potentials . The chief advantage of an electro- static instrument is that there is no change in charge at ...
... hence is in the same direction whether V is positive or negative . Thus the instrument may be used to measure alternating potentials . The chief advantage of an electro- static instrument is that there is no change in charge at ...
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 eg . 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 eg . 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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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 dynamic resistance effective electric field electromagnetic electromotive force electrons electrostatic element energy equal equation flux force frequency function galvanometer grad harmonic hence impedance induction integral ions known length linear load magnetic field magnetic moment magnitude maximum measured meter negative obtained ohms oscillations output parallel phase plane plate current positive potential difference potentiometer quantities R₁ radiation radius ratio reactance region represents resistance resonant rotation scalar shown in Fig solution surface temperature terminals theorem torque transconductance triode tube unit vacuum tube vector velocity voltage volts wave wire written zero