SOLVED - RC Circuit - Question http://img291.imageshack.us/img291/5585/bulbd.th.jpg [Broken] This problem is giving me a headache. I feel certain that bulb B is the brightest when the capacitor has half its maximum charge. However, I am having a hard time coming up with equations for the circuit using Kirchhoff's voltage and current laws. I do know that if the capacitor had its maximum charge then there would be no current in the right hand circuit. But I am a little unsure what is going on under the declared condition. I suspect that there is no current in the closed circuit that includes bulb C. And the fact that the capacitor has half its maximum charge means that the potential difference is 55V across the capacitor. I would love a nudge in the right direction... I am stuck. Cheers!