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How do the two half cells of Daniel cell know when they are connected?

I’m currently studying electrochemistry in school, and there is something I don’t can’t quite understand about Daniel cell. When you put $\ce{Zu}$ solid into $\ce{ZuSO4}$ solution, does the electrode become negatively charged even before connecting it with the $\ce{Cu}$ half cell? I searched but I wasn’t able to form a clear understanding, I read that […]