Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation
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# Problem P. 4344. (April 2011)

P. 4344. A capacitor and a resistor of big resistance, through which the capacitor is charged slowly, are connected in series to a battery of electromotive force 4.5 V. The voltage across the capacitor is 3 V one minute after the closing the circuit. What will the voltage across the capacitor be

a) after 2 minutes;

b) after 3 minutes?

(4 pont)

Deadline expired on May 10, 2011.

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

Megoldás. $\displaystyle a)$ 4 V.

$\displaystyle b)$ 4,33 V.

### Statistics:

 65 students sent a solution. 4 points: 54 students. 3 points: 2 students. 1 point: 1 student. 0 point: 6 students. Unfair, not evaluated: 2 solutions.

Problems in Physics of KöMaL, April 2011