Correct Answer : Option (B) : Copper loss
Explanation : As we know, the transformer has primarily two types of losses Iron loss and copper loss. Iron loss is always constant, whereas copper losses are varying with a load.
Iron loss = Hysteresis loss + Eddy current loss
Both hysteresis loss and eddy current loss do not depend upon load current, which means iron losses are constant with varying load.
Copper loss = Conduction losses in conductor winding, which are directly proportional to the current square.
