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).
Deadline expired on 11 December 2008.