You are in the USA and you buy a hair dryer rated at 1200 W. In the USA the mains electricity supply is at 120 V. You bring the hair dryer back with you to Australia and power it from our 240V mains supply. What power is drawn when using it in Australia? Continuing with the previous question: You buy a transformer to reduce the 240 V mains supply to 120 V. If the transformer has 110 turns in its primary coil, how many turns comprise its secondary coil?