If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the ___________terminal of the battery.
Electrolysis
Copper ions accept 2 electrons to form copper which gets deposited at the cathode.
Oxygen gas is formed at the positive electrode, an oxidation reaction (electron loss).
The negative sulfate ions are attracted to the positive electrode, but due high oxidation potential of the hydroxyl ion, it gets oxidized and the sulphate ion being stable remains in the solution.
Therefore, if you pass current through copper sulphate solution, copper gets deposited on the plate connected to the negative terminal of the battery.