Two infinite, uniformly charged, flat surfaces are mutually perpendicular. One of the sheets has a charge density of +60 pC/m2, and the other carries a charge density of –80 pC/m2. What is the magnitude of the electric field at any point not on either surface?

The electric field at any point not on either surface is 11.28 N/C.            

Explanation:

Given that,

The surface charge density of first sheet,

The surface charge density of second sheet,

The relation between the electric field and the surface charge density is given by :

For first sheet :

For second sheet,

The net magnitude of the electric field at any point not on either surface is given by :

So, the electric field at any point not on either surface is 11.28 N/C.                                                          

it about 600 mph from what i calculated