Mathematical and Physical Journal
for High Schools
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Problem P. 3809. (May 2005)

P. 3809. Two identical solenoids are closely packed with a common axle. The cross section of the coils is A and there are n turns of the coil in the unit length. What is the force between them if we have

a) current I in both of them?

b) current I1 in one and I2 in the other?

(5 pont)

Deadline expired on June 13, 2005.


11 students sent a solution.
5 points:Gyenis András, Meszéna Balázs, Pálinkás Csaba.
4 points:Hagymási Imre, Nagy 555 Zoltán, Széchenyi Gábor.
3 points:2 students.
2 points:1 student.
1 point:2 students.

Problems in Physics of KöMaL, May 2005