The number of turns of the wire taken in the region of the core for the primary compared with the secondary permits the step-up or step-down transformers action. It at all there are 100 winding done in the primary then there must also be 100 windings in the secondary ,a 10Volts Alternating Current indication is functional to the primary will effect in a just about 10Volts Alternating Current indication on the secondary, not considering of the DC voltage level of the primary.

In any case if the secondary windings are 200 but the primary windings are 100 the unchanged 10Volts Alternating Current indication on the primary will provide approximately 20 10Volts Alternating Current on the secondary.

The dissimilarity among theoretical secondary and authentic secondary consequences will be on the basis of its stiffness of the windings, the material of the transformer core and additional factors, however the rough numbers will hold factual.