Problem P. 4230. (February 2010)
P. 4230. Uniformly charged square-shaped sheets of sides a and of charge Q, are used to build a cube. What is the electrostatic repelling force exerted on each face of the cube?
Deadline expired on 10 March 2010.
Sorry, the solution is available only in Hungarian. Google translation
Megoldás. \(\displaystyle F=Q^2/(2\varepsilon_0a^2).\)