Problem P. 4199. (November 2009)

P. 4199. A long uniformly charged rod, made of some insulating material, is bent into a semicircle in the middle of the rod. What is the electric field at the centre of the semicircle O?

(5 pont)

Deadline expired on December 10, 2009.

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

Megoldás. Nulla.

Statistics:

34 students sent a solution.
5 points:	Batki Bálint, Bolgár Dániel, Börcsök Bence, Budai Ádám, Fonai Dániel, Hartstein Máté, Jéhn Zoltán, Kaposvári István, Kószó Simon, Laczkó Zoltán Balázs, Lájer Márton, Lőrincz Dóra, Mayer Martin János, Patartics Bálint, Szabó 928 Attila, Vuchetich Bálint, Wang Daqian, Zelei Kristóf, Zsolczai Viktor.
4 points:	Janosov Milán, Kungl Ákos Ferenc.
3 points:	2 students.
2 points:	4 students.
1 point:	3 students.
0 point:	2 students.
Unfair, not evaluated:	2 solutionss.

Problems in Physics of KöMaL, November 2009