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Wednesday, 13 July 2011

n.13 - due piani carichi

Two infinite sheets of  electric charges with uniform densities intersect at right angles. The plane of the figure is perpendicular to the planes. Let us suppose that changes cannot move.
a) Find the magnitude and direction  of the electric field everywhere and sketch the lines of the field, in the case that a sheet has positive density (+sigma) and the other an equal but negative density (-sigma).
b) find the magnitude and direction of the electric  field everywhere and sketch the lines of the field, in the case that the two sheets have the same densitity with the same positive sign, + sigma.
c) Find the difference of potential V(A)-V(B), between the point A and B placed at a distance d on a line in the plane of the figure at 45° with respect to the charged planes.