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I am currently in high school and will be conducting an experiment looking at the effect of surface area on electroplating. I will be changing the surface area of the Cathode during my experiment but am unsure whether the amp and voltage would be controlled or dependant variables.

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The voltage won't vary as it depends on the materials used as active electrodes and their respective standard reduction potentials. The current will vary with plate area due to varying resistance of the cathode plate.

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