Mathematical and Physical Journal
for High Schools
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Problem P. 4659. (September 2014)

P. 4659. Inside a thin shell hollow metal sphere of radius 20 cm there is a metal ball of radius 10 cm. The centres of the ball and the sphere coincide. The inside ball is earthed with a very long wire, which is led through a small hole in the outer sphere. The outer sphere is given a charge of \(\displaystyle 10^{-8}\) C. What will the potential of the outer sphere be?

(6 pont)

Deadline expired on October 10, 2014.


31 students sent a solution.
6 points:Asztalos Bogdán, Balogh Menyhért, Csathó Botond, Fehér Balázs, Fekete Panna, Gróf Tamás, Holczer András, Kaposvári Péter, Kasza Bence, Kovács Bence Gábor, Olosz Balázs, Öreg Botond, Papp 893 Marcell, Sal Kristóf, Szentivánszki Soma , Tihanyi Áron, Tompa Tamás Lajos, Zöllner András.
0 point:11 students.
Unfair, not evaluated:2 solutions.

Problems in Physics of KöMaL, September 2014