What is the magnetic force of a 30m long power line that carries a current of 50A. The magnetic field runs perpendicular to the power line and has a strength of 30T. A. 45000 T/N

B. 45 V

C. 45 N

D. 45000 N

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?