Measurement of Self Inductance by Owen Bridge 
The reliability of the instrument refer to
An owen's bridge is used to measure the properties of a sample of sheet steel at 2kHz. At balance, arm ab is test specimen; arm bc is R3=50Ω; arm cd is C4=0.5`uF` and arm da is R2=834Ω in series with C2=0.124`uF`.Calculate the effective impedence of the specimen under test conditions.
AC bridges are used for the measurement of.
Which factor is the ratio of the total flux to the useful flux in a magnetic circuit