What is the transformation ratio in transformer?

What is the transformation ratio in transformer?
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1 Answer

Answer :

Equation for transformation ratio is,
 E2/E1 = N2/N1 = k
k = >1 in step up transformer, where secondary turns are more and thus voltage is
more to reduce the transmission current.
k = <1 in step down transformer, where secondary turns are less than primary and
low voltage for consumer use.
If we include the current in transformation ration the equation is,
 E2/E1 = N2/N1 = I1/I2 = k
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