Maxwell Inductance Capacitance Bridge
Maxwell Inductance Capacitance Bridge in Electrical and Electronic Measuring Instruments uploaded at Engineering Study material
Maxwell Inductance Capacitance Bridge in Electrical and Electronic Measuring Instruments uploaded by Gust M uploaded in Engineering Study material at lecturenotes.net
Maxwell Inductance Capacitance Bridge
In this bridge arrangement, the value of
unknown inductance is measured by comparison with a variable standard
capacitor. Figure 2.13 shows its circuit arrangement and phasor diagram. Two
arms bc and ad consist of non-inductive resistance R2 and R3. One of the arms ac consists
of variable standard capacitor C4 connected in parallel to a non-inductive resistance R4. The remaining arm ab consists of unknown
inductance Lx of effective resistance Rx. A source of
current is applied to two opposite junctions across ac and a
null detector is connected to the other two junctions b and d.
Hence, the impedances of four arms are
Z1 = Rx + jwLx
Z2 = R2
Z3 = R3
Note:
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