# If an automobile moves with constant power P, relation between velocity and time will be: O v is proportional to √t
O v is proporrional to 2^√t
O v is proportional ro t^2
O v is proportional to t​

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?