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Message: <blockquote data-quote="Josh" data-source="post: 2102341" data-attributes="member: 207441">I know that DC can be graphically explained as unidirectional flow of electric charge.Also I know in AC, electric charge would move forward, then backward on and on.I also know that DC usually comes from battery and AC comes from the house wall.That's all I know.  Just the definition.Please tell give me some example and help me further understand these two things. Anything that I didn't mention above that'll help me understand it more.  I did look up on the net & wikipedia but it's confusing.</blockquote>