An iron-cored choking coil takes 8 A at a power factor of 0.6 when supplied at 120V,50Hz . When the iron Core is removed and the supply reduced to 15V , the current rises to 6 A at power factor of 0.9 . Determine a, the Iron loss in the core, the copper lose at 5A and the Inductance of the choking coil with the core when carrying a current of 5A