Q. An Auto transformer which has only one winding may be used as __.

A
Step-up transformer
B
Step-down transformer
C
Step-up and Step-down transformer
D
None of these
Solution:

Auto transformer, there is only one winding (which is used both as a Primary and Secondary). Thus, in an In an Auto Transformer, The Primary and Secondary are Magnetically as well as Electrically Coupled.

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