I have a few questions concerning capacitators. 1.) When exactly does a capacitator discharge. Is it only when its voltage equals that of the power source and cancel each other out or is the capacitator always discharging at a slow rate. 2.) I read that when you use a capacitator in conjunction with a resistor you can make a timer device. How does that work? Does the resistor block off all the low current and only lets current flow whenever the capacitator builds charge greater than the resistance? 3.) When the capacitators emf equals the power sources emf and cancel each other out is the section of wire between the battery and the capacitator completely dead?