Measurement of Self Inductance by Owen Bridge            

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=100Ω; arm cd is C₄=0.1`uF` and arm da is R₂=834Ω in series with C₂=0.124`uF`. Calculate the effective impedence of the specimen under test conditions.

The AC Bridge used for the measurement of inductance is/are