Problem M. 325. (September 2012)

M. 325. Charge a capacitor of known capacitance (e.g. 2200 F) to a given voltage (e.g. 9 V), and then discharge it through a resistor of known resistance (e.g. 47 k). Measure and plot the graph of the voltage across the condenser as a function of the elapsed time. How long does it take for the voltage to decrease to

a) one half;

b) one fourth of its initial value?

(6 pont)

Deadline expired on October 10, 2012.

Statistics:

52 students sent a solution.
6 points:	Agócs Fruzsina, Barta Szilveszter Marcell, Bodor Gábor, Holczer András, Horicsányi Attila, Kollarics Sándor, Kovács 444 Áron, Olosz Balázs, Sági Olivér, Szabó 262 Lóránt, Szabó 928 Attila, Török Dávid.
5 points:	Asztalos Bogdán, Bozóki Zoltán, Csipor János, Garai Zoltán, Garami Anna, Juhász Péter, Károlyi Áron, Nagy Gergely, Szathmári Balázs, Szücs Botond.
4 points:	10 students.
3 points:	7 students.
2 points:	8 students.
1 point:	4 students.
0 point:	1 student.

Problems in Physics of KöMaL, September 2012