What does a source of electrical energy do in an electrical circuit? Imagine the electrical circuit as water channels, containers and such. In order for the water to flow in those channels, you need to raise to water high enough or provide enou â¦ gh water pressure to go through thick and thin pipes and fill in the containers.
The electric field must be zero inside the solid part of the sphere Outside the solid part of the sphere, you can find the net electric field by adding, as vectors, the electric field from the point charge alone and from the sphere alone We know that the electric field from the point charge is given by kq / r 2.
= E A cos. You can also think of the electric flux as the number of electric field lines that cross the surface. Remembering the dot product or the scalar product, we can also write this as. = E A. where E is the electric field and A is a vector equal to the area A and in a direction perpendicular to that area. Sometimes this same information is given as. A = A n. where n is a unit vector pointing perpendicular to the area.