Copper Plate
Posted on Sunday, December 28th, 2008 at 10:07 amA square plate of copper with 50 cm sides has no net charge and is placed in a?
A square plate of copper with 50 cm sides has no net charge and is placed in a region of uniform electric field of 80.0 kN/C directed perpendicular to the plate. Find (a) thr charge density at each face of the plate and (b) the total charge on each face.
a) E_ext = 2E = (local surface charge density)/eps_0
so, (local surface charge density) = E_ext*eps_0.
80.0 kN/C = 80x10^3
(80x10^3) * (8.85x10^-12) = 7.08x10^-7 or 708 nC/m^2
the answer will neg and pos... so you will have two answers... -708, 708
b) for each plate ----> multiply the answers by the sides squared.
-708 * .50^2 = -177
708 * .50^2 = 177
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