Is it similar to the waves on the surface of an ocean, where the particles go 2 steps forward and 1 step back in waves? If so, what makes it do that? Why would that be used instead of DC current?
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Imagine a loop of string wrapped around a pipe. You can pull it in once direction, and the friction will heat up the pipe, that’s DC, or you can move it back and forth, the effect will be the same, that’s AC. This behaviour depends only on what’s happening where you hold the string. You can just pull on one side or you can alternate where you pull.
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