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As I was reading about the experimental arrangement for photoelectric effect, I saw a diagram that puzzled my knowledge of electrodes. I found that in the experimental setup the cathode of the photoelectric plate or emitter was connected to the positive terminal of the cell. Why is it so? How can a negative electrode be connected to positive terminal of a cell?
I read Wikipedia article on cathode and it said " In a device which consumes power, the cathode is negative, and in a device which provides power, the cathode is positive". What does this mean?