Mathematical and Physical Journal
for High Schools
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Problem P. 3835. (November 2005)

P. 3835. In our car both the head and the rear lights are connected to a 12 V rechargeable battery through a single 30 A fuse. The two headlights are each rated 55 W, and the two deadlights are each rated 30 W, and one of them goes wrong, while the fuse melts. We have spare bulbs, but the spare fuse that we have is rated 20 A. Can we use it?

(3 pont)

Deadline expired on December 12, 2005.


234 students sent a solution.
3 points:205 students.
2 points:7 students.
1 point:10 students.
0 point:6 students.
Unfair, not evaluated:6 solutionss.

Problems in Physics of KöMaL, November 2005