P. 4270. The switch in the circuit, shown in the figure has been closed for quite a long time. (U=100 V, C=2 F, R1=20 , R2=30 , R3=12 .)
a) Determine the charge on the capacitor.
b) The switch is opened. What amount of charge flows through the resistor R1 after opening the switch?
c) How much work is done on the resistor R1 after opening the switch?
Deadline expired on 11 October 2010.
Google Translation (Sorry, the solution is published in Hungarian only.)
Megoldás. \(\displaystyle a)\) A kondenzátor töltése \(\displaystyle 100~\mu\)C.
\(\displaystyle b)\) \(\displaystyle 60~\mu\)C töltés halad át az 1-es ellenálláson.
\(\displaystyle c)\) A hőleadás 1,5 mJ.