An individual electron can be thought of as a spinning sphere of negative charge. A charged spinning sphere will generate a magnetic field, whose direction is indicated by the magnetic moment of the object, vector mu. In what direction will the electron rotate, based on the direction of its magnetic moment and the direction of the uniform magnetic field that it is immersed in?

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?