The correct answer is C. A delta/star transformer works satisfactorily on balanced as well as unbalanced loads.
A delta/star transformer is a type of transformer that has a delta winding on the primary side and a star winding on the secondary side. The delta winding is connected in a triangle configuration, while the star winding is connected in a star configuration.
When a balanced load is connected to the secondary winding of a delta/star transformer, the current in each phase of the secondary winding is equal. This means that the current in the neutral wire is zero.
When an unbalanced load is connected to the secondary winding of a delta/star transformer, the current in each phase of the secondary winding is not equal. This means that the current in the neutral wire is not zero.
However, the delta/star transformer can still work satisfactorily with an unbalanced load. This is because the current in the neutral wire is not a significant factor in the operation of the transformer.
The main factor in the operation of a transformer is the voltage and current in the primary winding. The voltage and current in the secondary winding are proportional to the voltage and current in the primary winding.
Therefore, a delta/star transformer can work satisfactorily on balanced as well as unbalanced loads.