A transformer takes a current of 0.8A, when its primary is connected to a 240V, 50Hz supply, the secondary being open circuit. If the power absorbed is 72 watts, determine (a) the iron loss current,...

A transformer takes a current of 0.8A, when its primary is connected to a 240V, 50Hz supply, the secondary being open circuit. If the power absorbed is 72 watts, determine (a) the iron loss current, (b) the power factor on no-load, and (c) the magnetizing current.