Finding the electic field inside a sphere

[radenm]

Homework Statement

what is the magnitude and direction of the electric field just inside the sphere?
givens: radius=10cm charge=.4uC

Homework Equations

E=kq/r^2

The Attempt at a Solution

i found that the electric field just outside the sphere is 360000vm^-1
i just don't know how to find the field on the inside of the sphere

 

[LowlyPion]

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elesph.html#c2

 

[radenm]

thank you