Mathematical and Physical Journal
for High Schools
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Problem P. 4020. (November 2007)

P. 4020. A physicist works in a laboratory where the magnetic induction is 5 mT. She wears a golden necklace which encloses an area of 0.02 m2, and which has a resistance of 0.01 \Omega. What is the maximum of the current that flows in the necklace if the the magnetic induction decreases uniformly to 1 mT in 1 ms?

(4 pont)

Deadline expired on December 11, 2007.


129 students sent a solution.
4 points:121 students.
3 points:1 student.
1 point:3 students.
0 point:1 student.
Unfair, not evaluated:3 solutionss.

Problems in Physics of KöMaL, November 2007