I read that capacitors that are part of DC circuits have a reactance that is essentially infinite. When I look at equations, this seems to make sense: If the reactance X=1/ωC, ω is zero in a dc circuit and so this means that X approaches a very large value. Thus, if you use V=IX, this means very little current will run, right? But current certainly runs as you charge a capacitor-- but I thought that you could charge a capacitor with direct current. Also, and this may be related, would this mean displacement current can only run through capacitors with an AC source? If so, why is this? I consulted a textbook and found an equation relating the change in electric flux to displacement current, but why does there need to be a change? Is it induced? Because I thought displacement current "ran" through a capacitor, creating a magnetic field, but I wasn't aware that there had to be a changing EMF to create it. Sorry if this is all over the place, I just can't pinpoint the exact concept that is confusing me. Any help on this topic will likely help clarify my perspective, so please, show me where I have misconceptions!