# physics

posted by
**Anonymous** on
.

There is a very large horizontal conducting plate in the x-y plane (consider it infinitely large). Its thickness is h . The charge densities on the upper and the lower surfaces are both equal to +σ.

The goal of this problem is to find the electric field (magnitude and direction) at different points.

(a) Consider a point 2h above the upper surface. What is the direction of the electric field?

What is the magnitude of the electric field? Express your answer in terms of, if necessary,σ , h and the constant epsilon_0 .

unanswered

(b) Consider now a point 3h below the lower surface. What is the direction of the electric field?

What is the magnitude of the electric field? Express your answer in terms of, if necessary,σ , h and the constant epsilon_0 .

unanswered

(c) Consider now a point h/4 below the top surface.

What is the magnitude of the electric field? Express your answer in terms of, if necessary, σ , h and the constant epsilon_0 .