## Methods of measuring the inductances of low-resistance standards |

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60 cycles absolute measurement adjusted Agnew and Silsbee angle at 60 apparatus apparent phase angle assumed balance Bulletin calculated carries no current certainty change in phase change in resistance connected as shown constant copper current and potential Current capacity current distribution curve definite manner deflection produced depend directly described determined diagram easily electromotive forces Eliminating errors due EXPERIMENTAL four-terminal conductors frequency galvanometer circuits give given in Table harmonic ideal conditions impedance leads low resistance low-resistance standard magnitude measurement of resistance measuring the sum ments method of measuring METHOD This method minute motor mutual inductances observations obtained phase difference pL/R precision attainable primary quadrature resistance and inductance resistance standards resonating system Rosa Scientific Paper SECOND METHOD secondaries selective sensitivity shown in Fig speed sufficient sum of phase Systematic errors terminals Trans transformer values varied vector vibration galvanometer voltage Wenner