You can think of a capacitor as sort of like a rubber membrane stretched across the pipe. It allows some water to flow as it distends but then stops. When diste

You can think of a capacitor as sort of like a rubber membrane stretched across the pipe. It allows some water to flow as it distends but then stops. When distended like that, it has some reverse pressure that wants to flow back. An inductor would be something like a propeller/impeller attached to a flywheel.