Mathematical and Physical Journal
for High Schools
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Problem P. 3902. (May 2006)

P. 3902. By what factor would the dissipated power of an electric heating element change if it was connected to an ideal diode in series and this system was connected to an alternating voltage supply of 230 V, 50 Hz? What would be the root-mean-square value of the voltage across the electric heating element? What is the ratio of this value and the maximum of the voltage?

(4 pont)

Deadline expired on June 12, 2006.


Statistics:

36 students sent a solution.
4 points:Almási 270 Gábor András, Blastik Zsófia, Borbély Adrienn, Csire Gábor, Deli Gábor, Engedy Balázs, Fodor Tibor, Fülöp Bálint, Gombos Gergely, Gresits Iván, Kónya 495 Gábor, Kovács 129 Gábor, Mándi Gábor, Matulik Gábor, Megyeri Balázs, Molnár 811 Kristóf, Nagy 317 Péter, Nagy 555 Zoltán, Pásztor Attila, Roósz Gergő, Sümegi Károly, Szabó 319 István, Széchenyi Gábor, Székely Gergely, Szilágyi Zsombor, Szolnoki Lénárd, Takács 484 Marcell.
3 points:Blázsik Zoltán, Varga Bonbien, Werner Miklós.
2 points:2 students.
1 point:3 students.
0 point:1 student.

Problems in Physics of KöMaL, May 2006