Mathematical and Physical Journal
for High Schools
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Problem P. 3944. (January 2007)

P. 3944. A spiral spring is hanged at one of its end such that its loops do not touch each other, and then it is connected to a voltage supply and current flows through it. Will the spring be compressed or stretched? What happens if it is connected to an alternating voltage supply?

(4 pont)

Deadline expired on February 12, 2007.


Statistics:

70 students sent a solution.
4 points:Balogh Balázs, Benyó Krisztián, Berta Katalin, Bódi László, Farkas Ádám László, Fekete Zsolt, Kohut Attila, Kómár Anna, Márkus Bence Gábor, Németh Dorián, Nigicser Bálint, Nyíri Dávid Ákos, Péter Zoltán, Réti Dávid, Sándor Bulcsú, Simon 256 Dávid, Szabó 128 Gabriella, Szél Péter, Szőcs 923 István, Takács 484 Marcell, Tolner Ferenc, Tűri Balázs, Tüzes Dániel, Vécsi Áron, Vida György.
3 points:Almási 270 Gábor András, Antal Éva, Bodnár Bence, Bőle Pál, Fábián András, Iván Dávid, Kiszel Kristóf, Kruppa Gergő, Nagy-Kovács Máté, Roósz Gergő, Sümegi Károly, Tóth 989 Beáta, Varga Bonbien.
2 points:20 students.
1 point:5 students.
0 point:7 students.

Problems in Physics of KöMaL, January 2007