Mathematical and Physical Journal
for High Schools
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# Problem P. 4690. (December 2014)

P. 4690. Two well-insulated condensers are charged on order to experiment with them. If they are connected in series, such that the oppositely charged terminals are connected, then altogether 166 V is measured across them. If they are connected in parallel, such that the same terminals are connected then the voltage across them is 74.4 V. In this latter case the energy loss is equal to the original energy of that condenser of capacitance $\displaystyle 10~\mu \rm F$, which had smaller voltage across its plates.

$\displaystyle a)$ What was the original voltage of the two condensers?

$\displaystyle b)$ What is the capacitance of the other condenser?

(5 pont)

Deadline expired on January 12, 2015.

### Statistics:

 32 students sent a solution. 5 points: Ardai István Tamás, Asztalos Bogdán, Balogh Menyhért, Blum Balázs, Büki Máté, Csathó Botond, Csorba Benjámin, Csurgai-Horváth Bálint, Fehér Balázs, Fekete Panna, Forrai Botond, Fülöp Erik, Holczer András, Jakus Balázs István, Kasza Bence, Kovács Péter Tamás, Körtefái Dóra, Olosz Balázs, Öreg Botond, Sal Kristóf, Szentivánszki Soma , Trócsányi Péter. 4 points: Kaposvári Péter, Kormányos Hanna Rebeka, Molnár 157 Marcell. 3 points: 4 students. 2 points: 3 students.

Problems in Physics of KöMaL, December 2014