A thick rod of impure copper should be attached to the positive terminal of the battery . the thin plate of the copper should be attached to the negative terminal of the battery . this is because the copper ions from the positive terminal will get attached to the negative terminal.
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A thick rod of impure copper should be attached to the positive terminal of the battery . the thin plate of the copper should be attached to the negative terminal of the battery . this is because the copper ions from the positive terminal will get attached to the negative terminal.