Electrical Engineering XYZ MCQs
Secondary winding of an auto transformer is also known as:
- Tertiary winding
- Damping winding
- Compensating winding
- Common winding
Correct answer: 4. Common winding
Explanation: An auto-transformer is a type of transformer with only one winding that serves as both the primary and secondary winding. The common winding is the portion of the winding that is shared by both the primary and secondary sides. In an auto-transformer, the common winding is responsible for transferring power from the input to the output. Unlike a conventional transformer with separate primary and secondary windings, an auto-transformer has a single winding with taps to provide different voltage levels.
So, the secondary winding of an auto-transformer is also referred to as the common winding.