Principles of Electricity and Electromagnetism |
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Page 56
... measured by recording the rate of deflection of the needle and the range may be varied by means of auxiliary capacities . Currents may also be measured by the aid of Ohm's law ( Sec . 3.4 ) . If a resistance R is placed between the free ...
... measured by recording the rate of deflection of the needle and the range may be varied by means of auxiliary capacities . Currents may also be measured by the aid of Ohm's law ( Sec . 3.4 ) . If a resistance R is placed between the free ...
Page 128
... measured is less than 0.1 ohm . One circuit for the elimination of terminal and con- tact resistances is the Kelvin double bridge which is shown in Fig . 4.20 . X is the unknown resistance and N is the standard with which it is to be ...
... measured is less than 0.1 ohm . One circuit for the elimination of terminal and con- tact resistances is the Kelvin double bridge which is shown in Fig . 4.20 . X is the unknown resistance and N is the standard with which it is to be ...
Page 134
... measured by the potentiometer on one range or the other and i ' is the current for full - scale deflection of the meter . For example , if the meter shows a full - scale deflection for 15 amp . , S should be a 0.1 - ohm standard . The ...
... measured by the potentiometer on one range or the other and i ' is the current for full - scale deflection of the meter . For example , if the meter shows a full - scale deflection for 15 amp . , S should be a 0.1 - ohm standard . 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 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