A conductive sphere with a radius of 250 cm and a surface ch

A conductive sphere with a radius of 25.0 cm and a surface charge density of +6.00 mu C/m is centered on the y axis at y = 1.50 m. A second conductive sphere with a radius of 10.0 cm and a surface charge density of +6.00 mu c/m is centered on the y axis at y = 0 m. What is the magnitude and direction of the electric field at y = 1.00 m?

Solution

Here ,

for the magnitude of electric field is given as

net electric field = - electric field due to 25 cm + electric field due to 10 cm

net electric field = 9 *10^9 * (- 4pi * 0.25^2 * 6 *10^-6/0.50^2 + 4pi * 0.10^2 * 6 *10^-6/1^2) j

net electric field = -162860.16 j N/C

the net electric field at this location is 162860.16 N/C in the negative y direction