What is the difference between transformation ratio and voltage ratio ? Why are they not identical ?

In theory, they are. In reality, there are resistive losses, reactive losses, magnetic losses, etc.

"

**Transformation ratio** is defined as the

**ratio** of secondary voltage to the primary voltage. It can also be defined as the

**ratio** of number of

**turns** in the secondary winding to the number of

**turns** in the primary winding. "

" A

**transformer turns ratio** is the division of the number of

**turns** in the primary winding by the number of

**turns** in the secondary winding by the equation TR = Np/Ns. This

**ratio** should also equal the voltage of the primary winding divided by the voltage of the secondary winding, as given by Vp/Vs. "

" The

**transformation ratio** is defined as the

**ratio of** the secondary voltage to primary voltage. And

**Turns Ratio** would be the number

**turns of** the primary winding to the secondary winding. Some transformers have multiple secondary windings as well to create multiple outputs. "