Two long parallel wires are separated by 15 cm. one of the wires carries a current of 34 a and the other carries a current of 69 a. the permeabilty of free space is 1.257 × 10−6 n · m/a. determine the magnitude of the magnetic force on a 5.9 m length of the wire carrying the greater current. answer in units of mn

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?