A friend returns to the United States from Europe with a 960-W coffeemaker, designed to operate from a 240-V line. She wants to operate it at the USA-standard 120 V by using a transformer. If the secondary coil has 60 turns, what the number of turns in the primary coil

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?