Can we use wheat stone bridge concept in case of a similar circuit of inductors??

[ShawnSilverblade]

If not then how to solve questions in which a wheat stone bridge like circuit is given with inductors in place of resistors or capacitors......like how to find equivalent inductance or current through it etc.... Please explain with an appropiate and detailed example(with pictures if possible )

Thanks

Nah no need for examples sry

Edited February 26, 2016 by ShawnSilverblade

[studiot]

Good morning, Shawn,

 

Yes you can use the same principle for reactive components, although the bridge is not then called a Wheatstone bridge.

 

AC bridges suitable for inductive measurements include the Maxwell Bridege, The Schering Bridge and the Hay Bridge.

 

In the general ac bridge, the DC battery of the wheatstone bridge is replaced by an ac source and you have to balance both the absolute magnitudes of the voltages and the phases

 

[math]\left| {{Z_1}} \right|\left| {{Z_3}} \right| = \left| {{Z_2}} \right|\left| {{Z_4}} \right|[/math]

 

and

 

[math]\left( {{\theta _1} + {\theta _3}} \right) = \left( {{\theta _2} + {\theta _4}} \right)[/math]

 

In general you would try to avoid more than one inductance in a bridge because they couple more readily than capacitors or resistors and what you require is self inductance not mutual inductance.

 

One alternative to bridges for inductive measurements is the Q meter.

Another is to use the impedance of the inductor to modify the feedback factor of an op amp.

Edited February 26, 2016 by studiot