A point charge of 20nC is located at (4,-1,3), and a uniform line charge of -25 nC/m lies along the intersection of the planes x=-4 and z-6.
a) calculate D at (3,-1,0).
B)how much electric flux leaves the surface of a sphere of radius 5 ,centered at the orgin?
c)repeat part b if the radius of the sphere is 10.