GENERAL KNOWLEDGE

Detailed explanation-1: -An alternating current cannot be used for electroplating because in ac polarity of battery i.e. direction of curent keeps on changing due to which ions which has to be deposit on surface [for electroplating] oscillate back and forth within the electrolyte and electroplating can’t be done.

Detailed explanation-2: -A.C. current causes discharge and ionization to alternate at the cathode thus giving no effective coating. Hence, we use direct current for electroplating. An alternating current cannot be used for electroplating.

Detailed explanation-3: -Hence AC current cannot be used in electroplating. For the purpose of heating, lighting and generation of mechanical energy we can use Alternating current.

Detailed explanation-4: -If we use AC supply then the polarity of the electrodes keeps changing which will affect the electrolysis. Therefore, AC cannot be used in electrolysis.

Detailed explanation-5: -Direct current should be used during electroplating.