My professor crammed an alternating current (AC) into one lesson. I have an OK understanding of AC but my question is as follows. Let's assume that our voltage goes from 60V to -60V, at some point the potential difference is 0 and I would think the current itself would also be 0. Does that mean that an object that was being powered would actually turn off instantaneously at this exact time? I don't think that an object would but am having a difficult time figuring out as to why they don't.