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P. 4534. What is the value of the resistance of the variable resistor R shown in the figure, when

a) the condenser is uncharged;

b) the voltage across the condenser is exactly half of U?

(4 points)

Deadline expired on 10 May 2013.

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

Megoldásvázlat. $\displaystyle a)$ $\displaystyle R=72~\Omega$.

$\displaystyle b)$ $\displaystyle R=\frac{63}{11}~\Omega\approx 5{,}7~\Omega$.

Statistics on problem P. 4534.
 76 students sent a solution. 4 points: 60 students. 3 points: 11 students. 2 points: 4 students. 0 point: 1 student.

• Problems in Physics of KöMaL, April 2013

•  Támogatóink: Morgan Stanley