Mathematical and Physical Journal
for High Schools
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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?

(5 pont)

Deadline expired on March 10, 2010.

Sorry, the solution is available only in Hungarian. Google translation

Megoldás. \(\displaystyle F=Q^2/(2\varepsilon_0a^2).\)


21 students sent a solution.
5 points:Galzó Ákos Ferenc, Jéhn Zoltán, Patartics Bálint, Szabó 928 Attila, Wang Daqian.
4 points:Bolgár Dániel, Kaposvári István.
3 points:7 students.
2 points:3 students.
1 point:4 students.

Problems in Physics of KöMaL, February 2010