Question

The tappings on the transformers is provided on __________

(a) h.v side at one end of the winding

(b) l.v. side at one end of the winding

(c) h.v side at middle

(d) l.v side at middle

I had been asked this question in my homework.

My question is based upon Autotransformers topic in section Transformers of Electrical Machines

Answer 1

Correct option is (c) h.v side at middle

The explanation: High voltage side winding has more voltage so the variation of the voltage will be more and better applicable. And it is better to place at the middle because it gives uniform voltage distribution by eliminating axial forces.