Problem M. 291. (November 2008)

M. 291. Measure the resistance of a 40 W tungsteen filament lamp at different temperatures. (Between -15 ^oC and +40 ^oC.) Determine the temperature coefficient of the resistance. It is advisable to use a digital ohmmeter. Do not use the mains power (220 V AC).

(6 pont)

Deadline expired on December 11, 2008.

Statistics:

16 students sent a solution.
6 points:	Balogh Máté, Gulyás Máté, Karsa Anita, Szabó 895 Dávid.
5 points:	Dobos Dániel, Farsang István, Maknics András.
4 points:	5 students.
3 points:	2 students.
2 points:	2 students.

Problems in Physics of KöMaL, November 2008