Mathematical and Physical Journal
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# Problem P. 4377. (October 2011)

P. 4377. A real coil was connected to an ohmic resistor of resistance 600  in series. The voltages across the coil and the resistor are 200 V and 100 V, respectively. What are the inductance and the resistance of the coil if the root-mean-square value of the voltage supply is 230 V and its frequency is 50 Hz.

(4 pont)

Deadline expired on November 10, 2011.

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

Megoldás. A tekercs induktivitása $\displaystyle L=3{,}8~$H és az ohmos ellenállása $\displaystyle 87~ \Omega.$

### Statistics:

 44 students sent a solution. 4 points: Antalicz Balázs, Barta Szilveszter Marcell, Bingler Arnold, Bolgár Dániel, Borbély Zsombor, Csathó Botond, Csóka József, Dénes Márk, Dinev Georgi, Dolecsek 888 Gellért, Fülep Andrea , Horicsányi Attila, Juhász Péter, Kollarics Sándor, Kovács 444 Áron, Laczkó Zoltán Balázs, Nagy Lajos, Nagyházi Nóra, Öreg Zsombor, Pázmán Zalán, Pölöskei Péter Zsolt, Sápi András, Seres Imre, Seress Dániel, Szabó 928 Attila, Szilágyi 585 Dezső, Tilk Bence, Tóth Balázs, Tran Duy An, Ürge László, Virágh Anna. 3 points: Földes Balázs, Gujás István, Sárvári Péter, Szentes Ákos, Vida Zsófia. 2 points: 3 students. 1 point: 5 students.

Problems in Physics of KöMaL, October 2011