Equating the real and imaginary parts on each side of this equation yields the parameters of the unknown impedance in terms of the known impedances:

Note that adjusting R1 affects only RX. The Maxwell bridge measures inductance by balancing the positive reactance of an unknown inductive device with a calibrated fraction of negative reactance of the known capacitor C1. If the reactance of the unknown device is actually capacitive (negative), then the Maxwell bridge cannot be balanced.

Transcribed Image Text:

R2R3 Rx= and Lx = R2R3C1 R1