Mathematical and Physical Journal
for High Schools
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Problem P. 4161. (April 2009)

P. 4161. The capacitors arranged as shown in the figure are all neutral. At a certain instant switch K1 is closed.

a) Find the voltage across each capacitors after switch K1 is closed.

b) After a short time switch K2 is closed as well. Determine the energy of the condensers.

c) How much heat was generated in the system after closing switch K2?

(5 pont)

Deadline expired on May 11, 2009.


51 students sent a solution.
5 points:Iván Dávid, Lovas Lia Izabella, Maknics András, Paripás Viktor, Réti Dávid, Török Lajos.
4 points:Bodosi Eszter, Jéhn Zoltán.
3 points:20 students.
2 points:16 students.
1 point:4 students.
Unfair, not evaluated:3 solutions.

Problems in Physics of KöMaL, April 2009