Im new to electronics and the whole concept of AC current is making my brain hurt. From what I've gathered AC current unlike DC moves back and forth. The electrons dont just flow straight around the circuit but theyre constantly moving back and forth. When it comes to Hertz and fluctuation are they talking about how many times the electrons flow back and forth or are they talking about fluctuations in the actual voltage or amperage? When they say fluctuation is it the fluctuation of voltage jumping from 10 volts to 8 volts and back again or what? I was reading that rectifying a circuit is converting the current from AC to DC and can be done with the use of a diode. Does that mean you have AC current until it hits the diode and the rest of the current past that point will be DC?