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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 points)

Deadline expired on 10 May 2011.

Google Translation (Sorry, the solution is published in Hungarian only.)

Megoldás. $\displaystyle a)$ 4 V.

$\displaystyle b)$ 4,33 V.

Statistics on problem P. 4344.
 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

•  Támogatóink: Morgan Stanley