Mathematical and Physical Journal
for High Schools
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Problem P. 4828. (March 2016)

P. 4828. The disc if radius \(\displaystyle r\), shown in the figure is made of some insulating material, and is rolling in uniform magnetic field without slipping along the horizontal ground at a constant speed of \(\displaystyle v\). The magnetic induction \(\displaystyle B\) is perpendicular to the plane of the disc. A thin copper rod of radius \(\displaystyle r\) joins the centre of the disc with the rim of the disc. Plot the induced electromotive force between the two ends of the copper rod as a function of the angle \(\displaystyle \alpha\), which is measured between the rod and the horizontal.

(4 pont)

Deadline expired on April 11, 2016.


Statistics:

30 students sent a solution.
4 points:Bartók Imre, Bekes Nándor, Csire Roland, Csorba Benjámin, Csuha Boglárka, Fehér 169 Szilveszter, Forrai Botond, Iván Balázs, Kasza Bence, Kovács Péter Tamás, Németh 777 Róbert, Sal Kristóf, Szentivánszki Soma , Takács Attila, Zöllner András.
3 points:Asztalos Bogdán, Csenger Géza, Jakus Balázs István, Körmöczi Dávid, Németh Flóra Boróka, Pázmán Előd, Radnai Bálint, Szántó Benedek, Tófalusi Ádám, Varga-Umbrich Eszter.
2 points:3 students.
1 point:1 student.
0 point:1 student.

Problems in Physics of KöMaL, March 2016