During lightning strikes from a cloud to the ground, currents as currents as high as 2.50×10^4 amps can occur and last for about 40.0 microseconds . how much charge is transferred from the cloud to the earth during such a strike?

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?