Mathematical and Physical Journal
for High Schools
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Problem P. 4723. (March 2015)

P. 4723. Current \(\displaystyle I\) in the wires shown in the figure flows in the direction of the arrows. (The wire forms two rays and two circular arcs of radius \(\displaystyle r\) and of central angle \(\displaystyle 90^\circ\).) What is the magnitude of the magnetic flux density \(\displaystyle \boldsymbol B\) at point \(\displaystyle O\) which is the common centre of the circles?

(4 pont)

Deadline expired on April 10, 2015.


Statistics:

31 students sent a solution.
4 points:Balogh Menyhért, Bencsik Bálint, Berta Dénes, Blum Balázs, Bugár 123 Dávid, Csathó Botond, Di Giovanni Márk, Fehér Balázs, Fekete Panna, Fülöp Erik, Galovics Bálint, Holczer András, Kasza Bence, Körtefái Dóra, Marosvári Kristóf, Olosz Balázs, Repkényi Dorottya, Sal Kristóf, Szépfalvi Bálint, Szilágyi Kristóf, Trócsányi Péter, Varga-Umbrich Eszter, Varju Ákos.
3 points:Büki Máté, Jakus Balázs István.
2 points:5 students.
1 point:1 student.

Problems in Physics of KöMaL, March 2015