Mathematical and Physical Journal
for High Schools
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Problem P. 3924. (November 2006)

P. 3924. If a bulb, rated at 15 W and 230 V, and another bulb rated at 100 W and 230 V are connected in series and a voltage supply of 230 V is applied the 15 W bulb operates as if it was connected to the 230 V voltage supply, but the 100 W bulb does not operate at all. Explain the phenomenon.

(4 pont)

Deadline expired on December 11, 2006.


221 students sent a solution.
4 points:175 students.
3 points:8 students.
2 points:10 students.
1 point:20 students.
Unfair, not evaluated:8 solutions.

Problems in Physics of KöMaL, November 2006