Mathematical and Physical Journal
for High Schools
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Problem P. 4224. (February 2010)

P. 4224. Two bulbs, rated at 230 V 40 W and 230 V 60 W, are connected in series to a voltage supply of 230 V. Which bulb will be brighter and why?

(3 pont)

Deadline expired on March 10, 2010.

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

Megoldás. A 40 W-os izzó felvett teljesítménye nagyobb, mint a 60 W-osé, így a 40 W-os ég fényesebben.


137 students sent a solution.
3 points:74 students.
2 points:24 students.
1 point:8 students.
0 point:23 students.
Unfair, not evaluated:8 solutions.

Problems in Physics of KöMaL, February 2010