Correct Answer : Option (C) : High voltage winding
Explanation : High voltage winding of a transformer has the less cross-sectional area. The net current flowing through the winding calculates the cross-sectional area. It means if the current high current flows through the winding, a high cross-sectional area will be obtained since the high voltage winding of a transformer has a low current, so it has a less cross-sectional area.
