a metal surface of diameter 20 cm is charged with 10 microcolumn. calculate the electric field intensity due to the charged hollow sphere at a point. 5 cm from the center of the sphere .30 cm from the center of sphere​

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?