Mathematical and Physical Journal
for High Schools
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Problem P. 3912. (September 2006)

P. 3912. Two long straight wires are hanged by 1.2-m long insulating threads as shown in the figure. A 1-m long piece of both wires has the mass of 20 g. The currents have the same magnitude in the wires. Find the current in the wires if the angle between the threads is 2o. What is the direction of the currents?

(4 pont)

Deadline expired on October 11, 2006.

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

Megoldás. I=27 A, irányuk ellentétes.


121 students sent a solution.
4 points:70 students.
3 points:38 students.
2 points:6 students.
1 point:1 student.
0 point:2 students.
Unfair, not evaluated:4 solutions.

Problems in Physics of KöMaL, September 2006