Measurement of Self Inductance of High Quality Factor Coil by Hay's Bridge 
Hay’s bridge is particularly useful for measuring
The four arms of the Hay Bridge, are arranged as follows. AB: consists with unknown impedance. BC: non-inductive resistor of 16800 `Ω`. CD: consists of non-inductive resistor of 950 `Ω` in series with a standard capacitor of 1.57 uF. DA:non-inductive resistor of 1000 `Ω`.The supply frequency is 50 Hz. Determine the inductance and resistance of the unknown impedance at balance condition